fix: remove main method and resolve build issues

Author: AbhiramSakha

src/main/java/com/thealgorithms/arrays/MaximumElement.java

@@ -1,5 +1,6 @@
 package com.thealgorithms.arrays;
 
+
 /**
  * This class provides a method to find the maximum element in an array.
  */
@@ -22,9 +23,4 @@ public static int findMax(int[] arr) {
 
         return max;
     }
-
-    public static void main(String[] args) {
-        int[] arr = {1, 5, 3, 9, 2};
-        System.out.println("Maximum element: " + findMax(arr));
-    }
 }