Revert strtr

strtr has two different signatures for each arity and as such cannot use arity
completion.

Author: iluuu1994

ext/standard/basic_functions.stub.php

@@ -2472,7 +2472,7 @@ function ucwords(string $string, string $separators = " \t\r\n\f\v"): string {}
 
 /**
  * @compile-time-eval
- * frameless-function {"arity": 2}
+ * @frameless-function {"arity": 2}
  * @frameless-function {"arity": 3}
  */
 function strtr(string $string, string|array $from, ?string $to = null): string {}