Remove now unused exception

Author: wilsonge

libraries/src/Error/JsonApi/InstallLanguageExceptionHandler.php

@@ -64,7 +64,6 @@ public function render(\Throwable $error): string
 			$errors->registerHandler(new SaveExceptionHandler);
 			$errors->registerHandler(new CheckinCheckoutExceptionHandler);
 			$errors->registerHandler(new SendEmailExceptionHandler);
-			$errors->registerHandler(new InstallLanguageExceptionHandler);
 			$errors->registerHandler(new FallbackExceptionHandler(JDEBUG));
 
 			$response = $errors->handle($error);