remove starter code templates for all questions in CodeChallenge component

Frontend/src/components/CodeChallenge.jsx

@@ -206,15 +206,7 @@ const CodeChallenge = () => {
           output: "[0,1]"
         }
       ],
-      starterCode: `/**
- * @param {number[]} nums
- * @param {number} target
- * @return {number[]}
- */
-var twoSum = function(nums, target) {
-  // Write your solution here
-  
-};`
+      starterCode: ``
     },
     "Q.2": {
       id: "palindrome-number",
@@ -231,14 +223,7 @@ var twoSum = function(nums, target) {
           explanation: "From left to right, it reads -121. From right to left, it reads 121-. Therefore it is not a palindrome."
         }
       ],
-      starterCode: `/**
- * @param {number} x
- * @return {boolean}
- */
-var isPalindrome = function(x) {
-  // Write your solution here
-  
-};`
+      starterCode: ``
     },
     "Q.3": {
       id: "valid-parentheses",
@@ -259,14 +244,7 @@ var isPalindrome = function(x) {
           output: "false"
         }
       ],
-      starterCode: `/**
- * @param {string} s
- * @return {boolean}
- */
-var isValid = function(s) {
-  // Write your solution here
-  
-};`
+      starterCode: ``
     }
   };
 
@@ -275,43 +253,10 @@ var isValid = function(s) {
     // Language-specific starter code templates
     const templates = {
       'JavaScript': problem.starterCode,
-      'C': `#include <stdio.h>
-#include <stdlib.h>
-#include <stdbool.h>
-
-// ${problem.title} solution
-
-int main() {
-  // Write your solution here
-  
-  return 0;
-}`,
-      'Python': `# ${problem.title}
-def solution():
-  # Write your solution here
-  # Use input() for user input in Python
-  # Example: name = input("Enter your name: ")
-  pass
-
-if __name__ == "__main__":
-  solution()`,
-      'Java': `public class Solution {
-  // ${problem.title}
-  public static void main(String[] args) {
-    // Write your solution here
-    
-  }
-}`,
-      'C++': `#include <iostream>
-#include <vector>
-using namespace std;
-
-// ${problem.title} solution
-int main() {
-  // Write your solution here
-  
-  return 0;
-}`
+      'C': ``,
+      'Python': ``,
+      'Java': ``,
+      'C++': ``
     };
     
     return templates[lang] || problem.starterCode;