Remove deprecation warning from pub top level. (#2735)

diff --git a/lib/src/command_runner.dart b/lib/src/command_runner.dart
index 0e14700..43de6f5 100644
--- a/lib/src/command_runner.dart
+++ b/lib/src/command_runner.dart
@@ -140,9 +140,6 @@
   Future<int> runCommand(ArgResults topLevelResults) async {
     _checkDepsSynced();
 
-    await log.warningsOnlyUnlessTerminal(() => log
-        .message('The `pub` command is deprecated. Run `dart pub` instead.'));
-
     if (topLevelResults['version']) {
       log.message('Pub ${sdk.version}');
       return 0;