Merge pull request neetcode-gh#1473 from MHamiid/patch-9

Remove unnecessary variable in 543-Diameter-Of-Binary-Tree.c

Author: Ahmad-A0

c/543-Diameter-Of-Binary-Tree.c

@@ -25,9 +25,9 @@ int recur(struct TreeNode* root, int* maxDiameter) {
 }
 
 int diameterOfBinaryTree(struct TreeNode* root) {
-    int * maxDiameter;
-    int result = 0;
-    maxDiameter = &result;
-    recur(root, maxDiameter);
-    return result;
+    int maxDiameter = 0;
+    
+    recur(root, &maxDiameter);
+    
+    return maxDiameter;
 }