[6.0] cs fixes

Author: nicolas-grekas

AbstractString.php

@@ -425,9 +425,6 @@ public function repeat(int $multiplier): static
 
     abstract public function replace(string $from, string $to): static;
 
-    /**
-     * @param string|callable $to
-     */
     abstract public function replaceMatches(string $fromRegexp, string|callable $to): static;
 
     abstract public function reverse(): static;