[ticket/12479] Remove deprecated functions

PHPBB-12479

Author: marc1706

files/filespec.php

@@ -398,7 +398,7 @@ public function check_content($disallowed_content)
 	 * @param bool $overwrite If set to true, an already existing file will be overwritten
 	 * @param bool $skip_image_check If set to true, the check for the file to be a valid image is skipped
 	 * @param string|bool $chmod Permission mask for chmodding the file after a successful move.
-	 *				The mode entered here reflects the mode defined by {@link phpbb_chmod()}
+	 *				The mode entered here reflects the mode defined by {@link \phpbb\filesystem\filesystem::phpbb_chmod()}
 	 *
 	 * @return bool True if file was moved, false if not
 	 * @access public

plupload/plupload.php

@@ -344,8 +344,9 @@ protected function integrate_uploaded_file($form_name, $chunk, $file_path)
 		}
 
 		$tmp_file = $this->temporary_filepath($upload['tmp_name']);
+		$filesystem = new \phpbb\filesystem\filesystem();
 
-		if (!phpbb_is_writable($this->temporary_directory) || !move_uploaded_file($upload['tmp_name'], $tmp_file))
+		if (!$filesystem->is_writable($this->temporary_directory) || !move_uploaded_file($upload['tmp_name'], $tmp_file))
 		{
 			$this->emit_error(103, 'PLUPLOAD_ERR_MOVE_UPLOADED');
 		}