remove unused variables from webdav file backend

apps/files_external/lib/webdav.php

@@ -77,16 +77,11 @@ class OC_FileStorage_DAV extends OC_Filestorage_Common{
 		$path=$this->cleanPath($path);
 		try{
 			$response=$this->client->propfind($path, array(),1);
-			$stripLength=strlen($this->root)+strlen($path);
 			$id=md5('webdav'.$this->root.$path);
 			OC_FakeDirStream::$dirs[$id]=array();
-			$skip = true;
-			foreach($response as $file=>$data){
-				// Skip the first file, because it is the current directory
-				if ($skip) {
-					$skip = false;
-					continue;
-				}
+			$files=array_keys($response);
+			array_shift($files);//the first entry is the current directory
+			foreach($files as $file){
 				$file = urldecode(basename($file));
 				OC_FakeDirStream::$dirs[$id][]=$file;
 			}
@@ -120,7 +115,7 @@ class OC_FileStorage_DAV extends OC_Filestorage_Common{
 	public function file_exists($path){
 		$path=$this->cleanPath($path);
 		try{
-			$response=$this->client->propfind($path, array('{DAV:}resourcetype'));
+			$this->client->propfind($path, array('{DAV:}resourcetype'));
 			return true;//no 404 exception
 		}catch(Exception $e){
 			return false;
@@ -201,7 +196,7 @@ class OC_FileStorage_DAV extends OC_Filestorage_Common{
 			$mtime=time();
 		}
 		$path=$this->cleanPath($path);
-		$this->client->proppatch($path, array('{DAV:}lastmodified' => $mtime,));
+		$this->client->proppatch($path, array('{DAV:}lastmodified' => $mtime));
 	}
 
 	public function getFile($path,$target){