Remove extra PHPDoc annotations (#111)

Author: mspirkov

.gitignore

@@ -9,14 +9,15 @@ vendor/
 # composer.lock
 
 
-### Editor (Vim, PhpStorm) ###
+### Editor (Vim, PhpStorm, VS Code) ###
 [._]*.s[a-w][a-z]
 [._]s[a-w][a-z]
 *.un~
 Session.vim
 .netrwhist
 *~
 .idea/
+.vscode
 
 composer.lock
 config.php

src/Issue/IssueSearchResult.php

@@ -17,7 +17,6 @@ class IssueSearchResult
     public $isLast = false;
 
     /**
-     * @var string
      * @var string|null
      */
     public $nextPageToken;
@@ -44,7 +43,6 @@ public function setIsLast($isLast)
     }
 
     /**
-     * @return string
      * @return string|null
      */
     public function getNextPageToken()