Revert "add model type to APIs" (#605)

Reverts meta-llama/llama-stack#588

llama_stack/apis/models/models.py

@@ -4,7 +4,6 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from enum import Enum
 from typing import Any, Dict, List, Literal, Optional, Protocol, runtime_checkable
 
 from llama_models.schema_utils import json_schema_type, webmethod
@@ -21,11 +20,6 @@ class CommonModelFields(BaseModel):
     )
 
 
-class ModelType(Enum):
-    llm = "llm"
-    embedding_model = "embedding"
-
-
 @json_schema_type
 class Model(CommonModelFields, Resource):
     type: Literal[ResourceType.model.value] = ResourceType.model.value
@@ -40,14 +34,11 @@ class Model(CommonModelFields, Resource):
 
     model_config = ConfigDict(protected_namespaces=())
 
-    model_type: ModelType = Field(default=ModelType.llm)
-
 
 class ModelInput(CommonModelFields):
     model_id: str
     provider_id: Optional[str] = None
     provider_model_id: Optional[str] = None
-    model_type: Optional[ModelType] = ModelType.llm
 
     model_config = ConfigDict(protected_namespaces=())
 
@@ -68,7 +59,6 @@ class Models(Protocol):
         provider_model_id: Optional[str] = None,
         provider_id: Optional[str] = None,
         metadata: Optional[Dict[str, Any]] = None,
-        model_type: Optional[ModelType] = None,
     ) -> Model: ...
 
     @webmethod(route="/models/unregister", method="POST")