chore(openapi): leave FileSchema only (header already supported)

Author: oyiz-michael

aws_lambda_powertools/event_handler/openapi/models.py

@@ -480,7 +480,7 @@ class OpenAPI(OpenAPIExtensions):
 
     model_config = MODEL_CONFIG_ALLOW
 
-# Helper schemas for new file & header support
+# Helper schema for file upload
 class FileSchema(BaseModel):
     """OpenAPI 3.0 schema for binary file uploads (multipart/form-data)."""
 
@@ -490,13 +490,6 @@ class FileSchema(BaseModel):
     model_config = MODEL_CONFIG_ALLOW
 
 
-class HeaderParamSchema(BaseModel):
-    """Schema for simple string header parameters."""
-
-    type: Literal["string"] = Field("string", const=True)
-
-    model_config = MODEL_CONFIG_ALLOW
-
 model_rebuild(Schema)
 model_rebuild(Operation)
 model_rebuild(Encoding)