remove assert for Flutter Driver (#31815)

packages/flutter_driver/lib/src/driver/driver.dart

@@ -935,7 +935,8 @@ void restoreVmServiceConnectFunction() {
 
 void _unhandledJsonRpcError(dynamic error, dynamic stack) {
   _log.trace('Unhandled RPC error:\n$error\n$stack');
-  assert(false);
+  // TODO(dnfield): https://github.com/flutter/flutter/issues/31813
+  // assert(false);
 }
 
 /// Waits for a real Dart VM service to become available, then connects using

packages/flutter_tools/lib/src/vmservice.dart

@@ -237,7 +237,7 @@ class VMService {
   }
 
   static void _unhandledError(dynamic error, dynamic stack) {
-    logger.printTrace('Error in internalimplementation of JSON RPC.\n$error\n$stack');
+    logger.printTrace('Error in internal implementation of JSON RPC.\n$error\n$stack');
     assert(false);
   }