[Minor] Remove from __future__ import annotations for python 3.8 (#1273)

tilelang/layout/swizzle.py

 """Wrapping Layouts."""
 # pylint: disable=invalid-name, unsupported-binary-operation
-
 from __future__ import annotations
+
 import tvm
 from tvm.tir import Buffer, BufferLoad, BufferRegion
 from tilelang import _ffi_api

tilelang/primitives/gemm/__init__.py

 from __future__ import annotations
-
 from tvm import tir
 from tilelang.utils import is_local, is_fragment, is_shared
 from tilelang.primitives.gemm.base import GemmWarpPolicy

tilelang/profiler/__init__.py

 """The profiler and convert to torch utils"""
 from __future__ import annotations
-
 from typing import Callable, Any, Literal
 from functools import partial
 import torch

tilelang/quantize/lop3.py

 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
-from __future__ import annotations
 from typing import Literal
 
 decode_i4_to_f16 = """

tilelang/quantize/mxfp.py

-from __future__ import annotations
 from typing import Literal
 
 # Implementation asm for fp4 to bf16, using twiddling

tilelang/transform/add_bufstore_wrapper.py

-from __future__ import annotations
 from tvm.tir import (BufferStore, For, AttrStmt, ForKind, Var, PrimFunc, BufferLoad, Buffer, IntImm)
 from tvm.tir.stmt_functor import ir_transform, post_order_visit
 from tvm.tir.transform import prim_func_pass

tilelang/utils/tensor.py

-from __future__ import annotations
 """The profiler and convert to torch utils"""
 from enum import Enum
 import torch