fix: remove broken non-asyncio prometheus grpc server interceptor (#3065

)

src/phoenix/server/grpc_server.py

@@ -1,7 +1,7 @@
-from typing import TYPE_CHECKING, Any, Awaitable, Callable, Optional
+from typing import TYPE_CHECKING, Any, Awaitable, Callable, List, Optional
 
 import grpc
-from grpc.aio import RpcContext, Server
+from grpc.aio import RpcContext, Server, ServerInterceptor
 from opentelemetry.proto.collector.trace.v1.trace_service_pb2 import (
     ExportTraceServiceRequest,
     ExportTraceServiceResponse,
@@ -58,11 +58,13 @@ def __init__(
         self._enable_prometheus = enable_prometheus
 
     async def __aenter__(self) -> None:
-        interceptors = []
+        interceptors: List[ServerInterceptor] = []
         if self._enable_prometheus:
-            from py_grpc_prometheus.prometheus_server_interceptor import PromServerInterceptor
-
-            interceptors.append(PromServerInterceptor())
+            ...
+            # TODO: convert to async interceptor
+            # from py_grpc_prometheus.prometheus_server_interceptor import PromServerInterceptor
+            #
+            # interceptors.append(PromServerInterceptor())
         if self._tracer_provider is not None:
             from opentelemetry.instrumentation.grpc import GrpcAioInstrumentorServer