Remove unused code in mod/

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

mod/lostpass.php

@@ -81,7 +81,6 @@ function lostpass_post(App $a)
 
 function lostpass_content(App $a)
 {
-	$o = '';
 	if ($a->argc > 1) {
 		$pwdreset_token = $a->argv[1];
 
@@ -127,7 +126,6 @@ function lostpass_form()
 function lostpass_generate_password($user)
 {
 	$o = '';
-	$a = \get_app();
 
 	$new_password = User::generateNewPassword();
 	$result = User::updatePassword($user['uid'], $new_password);