Remove unused code

- Remove commented code
- Remove unused/immediately overwritten variables
- Remove extraneous parameters
- Remove unreachable code
- Remove duplicate array keys

src/Core/Config/JITConfigAdapter.php

@@ -84,8 +84,6 @@ class JITConfigAdapter extends BaseObject implements IConfigAdapter
 
 	public function set($cat, $k, $value)
 	{
-		$a = self::getApp();
-
 		// We store our setting values in a string variable.
 		// So we have to do the conversion here so that the compare below works.
 		// The exception are array values.