[Chore] Remove duplicate `has_` functions in vllm.utils (#27372)

Signed-off-by: Jonathan <chenleejonathan@gmail.com>

vllm/utils/__init__.py

@@ -5,7 +5,6 @@ import contextlib
 import datetime
 import enum
 import getpass
-import importlib.util
 import inspect
 import json
 import multiprocessing
@@ -1048,46 +1047,6 @@ def check_use_alibi(model_config: ModelConfig) -> bool:
     )
 
 
-@cache
-def _has_module(module_name: str) -> bool:
-    """Return True if *module_name* can be found in the current environment.
-
-    The result is cached so that subsequent queries for the same module incur
-    no additional overhead.
-    """
-    return importlib.util.find_spec(module_name) is not None
-
-
-def has_pplx() -> bool:
-    """Whether the optional `pplx_kernels` package is available."""
-
-    return _has_module("pplx_kernels")
-
-
-def has_deep_ep() -> bool:
-    """Whether the optional `deep_ep` package is available."""
-
-    return _has_module("deep_ep")
-
-
-def has_deep_gemm() -> bool:
-    """Whether the optional `deep_gemm` package is available."""
-
-    return _has_module("deep_gemm")
-
-
-def has_triton_kernels() -> bool:
-    """Whether the optional `triton_kernels` package is available."""
-
-    return _has_module("triton_kernels")
-
-
-def has_tilelang() -> bool:
-    """Whether the optional `tilelang` package is available."""
-
-    return _has_module("tilelang")
-
-
 def length_from_prompt_token_ids_or_embeds(
     prompt_token_ids: list[int] | None,
     prompt_embeds: torch.Tensor | None,