add removeFirst method

ArrayManipulation.java

@@ -14,6 +14,18 @@ public class ArrayManipulation {
         return arr;
     }
 
+    public static int[] removeFirst(int[] arr) {
+
+        int[] newArray1 = new int[arr.length -1];
+
+        for (int i = 1; i < newArray1.length + 1; i++) {
+            newArray[i - 1] = arr[i];
+        }
+
+        return arr;
+    }
+
+
     public static int[] removeLast(int[] arr) {
 
         int[] newArray = new int[arr.length - 1];