refactor: remove Exceptions::isImplicitNullableDeprecationError

Author: paulbalandan

system/Debug/Exceptions.php

@@ -201,10 +201,6 @@ public function errorHandler(int $severity, string $message, ?string $file = nul
                 return true;
             }
 
-            if ($this->isImplicitNullableDeprecationError($message, $file, $line)) {
-                return true;
-            }
-
             if (! $this->config->logDeprecations || (bool) env('CODEIGNITER_SCREAM_DEPRECATIONS')) {
                 throw new ErrorException($message, 0, $severity, $file, $line);
             }
@@ -245,38 +241,6 @@ private function isSessionSidDeprecationError(string $message, ?string $file = n
         return false;
     }
 
-    /**
-     * Workaround to implicit nullable deprecation errors in PHP 8.4.
-     *
-     * "Implicitly marking parameter $xxx as nullable is deprecated,
-     *  the explicit nullable type must be used instead"
-     *
-     * @TODO remove this before v4.6.0 release
-     */
-    private function isImplicitNullableDeprecationError(string $message, ?string $file = null, ?int $line = null): bool
-    {
-        if (
-            PHP_VERSION_ID >= 80400
-            && str_contains($message, 'the explicit nullable type must be used instead')
-            // Only Kint and Faker, which cause this error, are logged.
-            && (str_starts_with($message, 'Kint\\') || str_starts_with($message, 'Faker\\'))
-        ) {
-            log_message(
-                LogLevel::WARNING,
-                '[DEPRECATED] {message} in {errFile} on line {errLine}.',
-                [
-                    'message' => $message,
-                    'errFile' => clean_path($file ?? ''),
-                    'errLine' => $line ?? 0,
-                ],
-            );
-
-            return true;
-        }
-
-        return false;
-    }
-
     /**
      * Checks to see if any errors have happened during shutdown that
      * need to be caught and handle them.