refactor: remove validation schema

src/pages/number/sum/index.tsx

@@ -42,10 +42,6 @@ export default function SplitText() {
   const [input, setInput] = useState<string>('');
   const [result, setResult] = useState<string>('');
 
-  const validationSchema = Yup.object({
-    // splitSeparator: Yup.string().required('The separator is required')
-  });
-
   return (
     <Box>
       <ToolInputAndResult
@@ -112,7 +108,6 @@ export default function SplitText() {
         }}
         initialValues={initialValues}
         input={input}
-        validationSchema={validationSchema}
       />
     </Box>
   );