Fix some scrutinizer warning in the sharing code

* Better phpdoc
* Promper use statements
* Unused parameter

apps/files_sharing/api/ocssharewrapper.php

@@ -36,7 +36,7 @@ class OCSShareWrapper {
 			\OC::$server->getUserSession()->getUser());
 	}
 
-	public function getAllShares($params) {
+	public function getAllShares() {
 		return $this->getShare20OCS()->getShares();
 	}
 

apps/files_sharing/api/share20ocs.php

@@ -50,7 +50,7 @@ class Share20OCS {
 	private $request;
 	/** @var IRootFolder */
 	private $rootFolder;
-	/** @var IUrlGenerator */
+	/** @var IURLGenerator */
 	private $urlGenerator;
 	/** @var IUser */
 	private $currentUser;

lib/public/share/imanager.php

@@ -23,7 +23,7 @@ namespace OCP\Share;
 
 use OCP\IUser;
 
-use OC\Share20\Exception\ShareNotFound;
+use OCP\Share\Exceptions\ShareNotFound;
 
 /**
  * Interface IManager
@@ -106,7 +106,7 @@ interface IManager {
 	 *
 	 * @param string $userId
 	 * @param int $shareType
-	 * @param File|Folder|null $node
+	 * @param \OCP\Files\File|\OCP\Files\Folder|null $node
 	 * @param int $limit The maximum number of shares returned, -1 for all
 	 * @param int $offset
 	 * @return IShare[]