remove double bundle exec

plugins/bundler/bundler.plugin.zsh

@@ -82,7 +82,7 @@ _binstubbed() {
 _run-with-bundler() {
   if _bundler-installed && _within-bundled-project; then
     if _binstubbed $1; then
-      bundle exec "./bin/$@"
+      ./bin/$@
     else
       bundle exec $@
     fi