delete unused files

docs/colossalai/colossalai.trainer.rst

-colossalai.trainer
-==================
-
-.. automodule:: colossalai.trainer
-   :members:
-
-.. toctree::
-   :maxdepth: 2
-
-   colossalai.trainer.hooks

docs/colossalai/colossalai.utils.activation_checkpoint.rst

-colossalai.utils.activation\_checkpoint
-=======================================
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-.. automodule:: colossalai.utils.activation_checkpoint
-   :members:

docs/colossalai/colossalai.utils.checkpointing.rst

-colossalai.utils.checkpointing
-==============================
-
-.. automodule:: colossalai.utils.checkpointing
-   :members:

docs/colossalai/colossalai.utils.common.rst

-colossalai.utils.common
-=======================
-
-.. automodule:: colossalai.utils.common
-   :members:

docs/colossalai/colossalai.utils.cuda.rst

-colossalai.utils.cuda
-=====================
-
-.. automodule:: colossalai.utils.cuda
-   :members:

docs/colossalai/colossalai.utils.data_sampler.base_sampler.rst

-colossalai.utils.data\_sampler.base\_sampler
-============================================
-
-.. automodule:: colossalai.utils.data_sampler.base_sampler
-   :members:

docs/colossalai/colossalai.utils.data_sampler.data_parallel_sampler.rst

-colossalai.utils.data\_sampler.data\_parallel\_sampler
-======================================================
-
-.. automodule:: colossalai.utils.data_sampler.data_parallel_sampler
-   :members:

docs/colossalai/colossalai.utils.data_sampler.rst

-colossalai.utils.data\_sampler
-==============================
-
-.. automodule:: colossalai.utils.data_sampler
-   :members:
-
-
-.. toctree::
-   :maxdepth: 2
-
-   colossalai.utils.data_sampler.base_sampler
-   colossalai.utils.data_sampler.data_parallel_sampler

docs/colossalai/colossalai.utils.gradient_accumulation.rst

-colossalai.utils.gradient\_accumulation
-=======================================
-
-.. automodule:: colossalai.utils.gradient_accumulation
-   :members:

docs/colossalai/colossalai.utils.memory.rst

-colossalai.utils.memory
-=======================
-
-.. automodule:: colossalai.utils.memory
-   :members:

docs/colossalai/colossalai.utils.multi_tensor_apply.multi_tensor_apply.rst

-colossalai.utils.multi\_tensor\_apply.multi\_tensor\_apply
-==========================================================
-
-.. automodule:: colossalai.utils.multi_tensor_apply.multi_tensor_apply
-   :members:

docs/colossalai/colossalai.utils.multi_tensor_apply.rst

-colossalai.utils.multi\_tensor\_apply
-=====================================
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-.. automodule:: colossalai.utils.multi_tensor_apply
-   :members:
-
-
-.. toctree::
-   :maxdepth: 2
-
-   colossalai.utils.multi_tensor_apply.multi_tensor_apply

docs/colossalai/colossalai.utils.rst

-colossalai.utils
-================
-
-.. automodule:: colossalai.utils
-   :members:
-
-.. toctree::
-   :maxdepth: 2
-
-   colossalai.utils.data_sampler
-   colossalai.utils.gradient_accumulation
-   colossalai.utils.multi_tensor_apply
-
-
-.. toctree::
-   :maxdepth: 2
-
-   colossalai.utils.activation_checkpoint
-   colossalai.utils.checkpointing
-   colossalai.utils.common
-   colossalai.utils.cuda
-   colossalai.utils.memory
-   colossalai.utils.timer

docs/colossalai/colossalai.utils.timer.rst

-colossalai.utils.timer
-======================
-
-.. automodule:: colossalai.utils.timer
-   :members:

docs/colossalai/colossalai.zero.loss_scaler.rst

-colossalai.zero.loss\_scaler
-============================
-
-.. automodule:: colossalai.zero.loss_scaler
-   :members:

docs/colossalai/colossalai.zero.rst

-colossalai.zero
-===============
-
-.. automodule:: colossalai.zero
-   :members:
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-
-.. toctree::
-   :maxdepth: 2
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-   colossalai.zero.loss_scaler
-   colossalai.zero.zero_redundancy_optimizer_level_2
-   colossalai.zero.zero_redundancy_optimizer_level_3

docs/colossalai/colossalai.zero.zero_redundancy_optimizer_level_2.rst

-colossalai.zero.zero\_redundancy\_optimizer\_level\_2
-=====================================================
-
-.. automodule:: colossalai.zero.zero_redundancy_optimizer_level_2
-   :members:

docs/colossalai/colossalai.zero.zero_redundancy_optimizer_level_3.rst

-colossalai.zero.zero\_redundancy\_optimizer\_level\_3
-=====================================================
-
-.. automodule:: colossalai.zero.zero_redundancy_optimizer_level_3
-   :members:

docs/conf.py

-# Configuration file for the Sphinx documentation builder.
-#
-# This file only contains a selection of the most common options. For a full
-# list see the documentation:
-# https://www.sphinx-doc.org/en/master/usage/configuration.html
-
-# -- Path setup --------------------------------------------------------------
-
-import datetime
-# If extensions (or modules to document with autodoc) are in another directory,
-# add these directories to sys.path here. If the directory is relative to the
-# documentation root, use os.path.abspath to make it absolute, like shown here.
-#
-import os
-import sys
-
-sys.path.insert(0, os.path.abspath('..'))
-
-# -- Project information -----------------------------------------------------
-
-project = 'Colossal-AI'
-copyright = f'{datetime.datetime.now().year}, HPC-AI Tech'
-author = 'HPC-AI Technology Inc.'
-
-# The full version, including alpha/beta/rc tags
-release = '0.0.1'
-
-
-# -- General configuration ---------------------------------------------------
-
-# Add any Sphinx extension module names here, as strings. They can be
-# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
-# ones.
-extensions = [
-    'sphinx.ext.autodoc',
-    'sphinx.ext.mathjax',
-    'sphinx.ext.napoleon',
-    'myst_parser',
-]
-
-# Disable docstring inheritance
-autodoc_inherit_docstrings = False
-
-# Disable displaying type annotations, these can be very verbose
-autodoc_typehints = 'none'
-
-# Enable overriding of function signatures in the first line of the docstring.
-autodoc_docstring_signature = True
-autodoc_default_options = {
-    'member-order': 'bysource'
-}
-
-# Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
-
-# List of patterns, relative to source directory, that match files and
-# directories to ignore when looking for source files.
-# This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['.build', 'Thumbs.db', '.DS_Store']
-
-# -- Options for HTML output -------------------------------------------------
-
-# The theme to use for HTML and HTML Help pages.  See the documentation for
-# a list of builtin themes.
-#
-html_theme = 'sphinx_rtd_theme'
-html_show_sourcelink = False
-html_theme_options = {
-    'navigation_depth': 2,
-}
-
-html_context = {
-    'display_github': False,
-    'github_user': 'hpcaitech',
-    'github_repo': 'ColossalAI',
-    #   'github_version': 'master/docs/',
-}
-
-# Add any paths that contain custom static files (such as style sheets) here,
-# relative to this directory. They are copied after the builtin static files,
-# so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
-
-html_css_files = [
-    'css/rtd_theme.css',
-]
-
-# -- Extension configuration -------------------------------------------------
-source_suffix = ['.rst', '.md', '.MD']