delete double of

delete double of

Author: Evgeniy

Diff for: docs/troubleshooting.md

@@ -2,7 +2,7 @@
 
 This page provides a list of common problems and the ways of solving them.
 
-### After logging in I'm redirected back without any sign of of being logged in
+### After logging in I'm redirected back without any sign of being logged in
 
 You probably haven't removed `user` from component section of your application.
 
@@ -14,4 +14,4 @@ Yii2-user identity class:
     'class' => 'app\components\User',
     'identityClass' => 'dektrium\user\models\User',
 ],
-```
+```