Add support for universal LLMContext to Grok LLM service

src/pipecat/services/grok/llm.py

@@ -190,12 +190,3 @@ class GrokLLMService(OpenAILLMService):
         user = OpenAIUserContextAggregator(context, params=user_params)
         assistant = OpenAIAssistantContextAggregator(context, params=assistant_params)
         return GrokContextAggregatorPair(_user=user, _assistant=assistant)
-
-    @property
-    def supports_universal_context(self) -> bool:
-        """Check if this service supports universal LLMContext.
-
-        Returns:
-            False, as GrokLLMService does not yet support universal LLMContext.
-        """
-        return False