Refine custom embedder configuration support

- Update custom embedder configuration method to handle custom embedding functions
- Modify type hints for embedder configuration
- Remove unused model_name parameter in custom embedder configuration

src/crewai/utilities/embedding_configurator.py

@@ -1,5 +1,5 @@
 import os
-from typing import Any, Dict, Union, cast
+from typing import Any, Dict, Optional, cast
 
 from chromadb import Documents, EmbeddingFunction, Embeddings
 from chromadb.api.types import validate_embedding_function
@@ -23,7 +23,7 @@ class EmbeddingConfigurator:
 
     def configure_embedder(
         self,
-        embedder_config: Union[Dict[str, Any], None] = None,
+        embedder_config: Optional[Dict[str, Any]] = None,
     ) -> EmbeddingFunction:
         """Configures and returns an embedding function based on the provided config."""
         if embedder_config is None:
@@ -38,7 +38,12 @@ class EmbeddingConfigurator:
                 f"Unsupported embedding provider: {provider}, supported providers: {list(self.embedding_functions.keys())}"
             )
 
-        return self.embedding_functions[provider](config, model_name)
+        embedding_function = self.embedding_functions[provider]
+        return (
+            embedding_function(config)
+            if provider == "custom"
+            else embedding_function(config, model_name)
+        )
 
     @staticmethod
     def _create_default_embedding_function():
@@ -206,7 +211,7 @@ class EmbeddingConfigurator:
         return WatsonEmbeddingFunction()
 
     @staticmethod
-    def _configure_custom(config, model_name):
+    def _configure_custom(config):
         custom_embedder = config.get("embedder")
         if isinstance(custom_embedder, EmbeddingFunction):
             try: