Revert unrelated TODO changes

Updated the main.js file to include a new TODO function and modified the snippet function documentation.

Signed-off-by: d-mahi14 <desaihmahi@gmail.com>

Author: d-mahi14

tools/snippets/lib/main.js

@@ -1,25 +1,40 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
 'use strict';
 
 // MAIN //
 
 /**
-* Example snippet function which returns the input value unchanged.
-*
-* This function exists as a simple demonstration utility for tooling
-* and documentation examples.
+* TODO: description
 *
-* @param {number} x - input value
-* @returns {number} input value
+* @param {<TODO: type>} TODO - TODO: param desc
+* @returns {<TODO: type>} TODO: desc
 *
 * @example
-* var v = snippet( 2.0 );
-* // returns 2.0
+* var v = TODO( 0.0 );
+* // returns TODO
 */
-function snippet( x ) {
-	return x;
+function TODO() {
+	// TODO: implementation
 }
 
 
 // EXPORTS //
 
-module.exports = snippet;
+module.exports = TODO;