Remove needless TypeErrors

Author: nicolas-grekas

AbstractUnicodeString.php

@@ -304,10 +304,6 @@ public function replaceMatches(string $fromRegexp, string|callable $to): static
         }
 
         if (\is_array($to) || $to instanceof \Closure) {
-            if (!\is_callable($to)) {
-                throw new \TypeError(sprintf('Argument 2 passed to "%s::replaceMatches()" must be callable, array given.', static::class));
-            }
-
             $replace = 'preg_replace_callback';
             $to = static function (array $m) use ($to): string {
                 $to = $to($m);

ByteString.php

@@ -303,15 +303,7 @@ public function replaceMatches(string $fromRegexp, string|callable $to): static
             $fromRegexp .= 'i';
         }
 
-        if (\is_array($to)) {
-            if (!\is_callable($to)) {
-                throw new \TypeError(sprintf('Argument 2 passed to "%s::replaceMatches()" must be callable, array given.', static::class));
-            }
-
-            $replace = 'preg_replace_callback';
-        } else {
-            $replace = $to instanceof \Closure ? 'preg_replace_callback' : 'preg_replace';
-        }
+        $replace = \is_array($to) || $to instanceof \Closure ? 'preg_replace_callback' : 'preg_replace';
 
         set_error_handler(static function ($t, $m) { throw new InvalidArgumentException($m); });