fix(vertexai): remove stale pyright ignores

Author: sipercai

instrumentation-genai/opentelemetry-instrumentation-vertexai/src/opentelemetry/instrumentation/vertexai/patch.py

@@ -173,7 +173,7 @@ def handle_response(
                 | None,
             ) -> None:
                 attributes = (
-                    get_server_attributes(instance.api_endpoint)  # type: ignore[reportUnknownMemberType]
+                    get_server_attributes(instance.api_endpoint)
                     | request_attributes
                     | get_genai_response_attributes(response)
                 )
@@ -257,7 +257,7 @@ def _with_default_instrumentation(
         kwargs: Any,
     ):
         params = _extract_params(*args, **kwargs)
-        api_endpoint: str = instance.api_endpoint  # type: ignore[reportUnknownMemberType]
+        api_endpoint: str = instance.api_endpoint
         span_attributes = {
             **get_genai_request_attributes(False, params),
             **get_server_attributes(api_endpoint),