remove from writeTrailers for now

Author: panchenko

servlet/src/main/java/io/grpc/servlet/ServletServerStream.java

@@ -268,10 +268,6 @@ public void writeFrame(@Nullable WritableBuffer frame, boolean flush, int numMes
 
     @Override
     public void writeTrailers(Metadata trailers, boolean headersSent, Status status) {
-      if (asyncCompleted) {
-        logger.fine("ignore writeTrailers as already completed");
-        return;
-      }
       if (logger.isLoggable(FINE)) {
         logger.log(
             FINE,