[Deprecation] Remove everything scheduled for removal in v0.10.0 (#20979)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

vllm/config.py

@@ -26,7 +26,7 @@ from pydantic import (ConfigDict, SkipValidation, TypeAdapter, field_validator,
 from pydantic.dataclasses import dataclass
 from safetensors.torch import _TYPES as _SAFETENSORS_TO_TORCH_DTYPE
 from torch.distributed import ProcessGroup, ReduceOp
-from typing_extensions import Self, deprecated, runtime_checkable
+from typing_extensions import Self, runtime_checkable
 
 import vllm.envs as envs
 from vllm import version
@@ -3659,18 +3659,6 @@ GuidedDecodingBackend = Literal[GuidedDecodingBackendV0,
 class DecodingConfig:
     """Dataclass which contains the decoding strategy of the engine."""
 
-    @property
-    @deprecated(
-        "`guided_decoding_backend` is deprecated and has been renamed to "
-        "`backend`. This will be removed in v0.10.0. Please use the "
-        "`backend` argument instead.")
-    def guided_decoding_backend(self) -> GuidedDecodingBackend:
-        return self.backend
-
-    @guided_decoding_backend.setter
-    def guided_decoding_backend(self, value: GuidedDecodingBackend):
-        self.backend = value
-
     backend: GuidedDecodingBackend = "auto" if envs.VLLM_USE_V1 else "xgrammar"
     """Which engine will be used for guided decoding (JSON schema / regex etc)
     by default. With "auto", we will make opinionated choices based on request
@@ -3713,9 +3701,6 @@ class DecodingConfig:
         return hash_str
 
     def __post_init__(self):
-        if ":" in self.backend:
-            self._extract_backend_options()
-
         if envs.VLLM_USE_V1:
             valid_guided_backends = get_args(GuidedDecodingBackendV1)
         else:
@@ -3731,24 +3716,6 @@ class DecodingConfig:
             raise ValueError("disable_additional_properties is only supported "
                              "for the guidance backend.")
 
-    @deprecated(
-        "Passing guided decoding backend options inside backend in the format "
-        "'backend:...' is deprecated. This will be removed in v0.10.0. Please "
-        "use the dedicated arguments '--disable-fallback', "
-        "'--disable-any-whitespace' and '--disable-additional-properties' "
-        "instead.")
-    def _extract_backend_options(self):
-        """Extract backend options from the backend string."""
-        backend, options = self.backend.split(":")
-        self.backend = cast(GuidedDecodingBackend, backend)
-        options_set = set(options.strip().split(","))
-        if "no-fallback" in options_set:
-            self.disable_fallback = True
-        if "disable-any-whitespace" in options_set:
-            self.disable_any_whitespace = True
-        if "no-additional-properties" in options_set:
-            self.disable_additional_properties = True
-
 
 DetailedTraceModules = Literal["model", "worker", "all"]