Leverage non-capturing catches

Author: fancyweb

UnicodeString.php

@@ -139,7 +139,7 @@ public function indexOf(string|iterable|AbstractString $needle, int $offset = 0)
 
         try {
             $i = $this->ignoreCase ? grapheme_stripos($this->string, $needle, $offset) : grapheme_strpos($this->string, $needle, $offset);
-        } catch (\ValueError $e) {
+        } catch (\ValueError) {
             return null;
         }