[5.2] Optimize Filesystem moveDirectory (#14362)

* Optimize Filesystem moveDirectory

* Remove redundant code

src/Illuminate/Filesystem/Filesystem.php

@@ -401,13 +401,9 @@ public function makeDirectory($path, $mode = 0755, $recursive = false, $force =
     public function moveDirectory($from, $to, $overwrite = false)
     {
         if ($overwrite && $this->isDirectory($to)) {
-            $this->deleteDirectory($to);
-
-            $this->copyDirectory($from, $to);
-
-            $this->deleteDirectory($from);
-
-            return true;
+            if (! $this->deleteDirectory($to)) {
+                return false;
+            }
         }
 
         return @rename($from, $to) === true;