Removed extra loop in Anagram.java (TheAlgorithms#3654)

Author: TaranjeetSinghKalsi

src/main/java/com/thealgorithms/strings/Anagrams.java

@@ -121,13 +121,8 @@ boolean approach4(String s, String t) {
             for (char c : t.toCharArray()) {
                 kk.put(c, kk.getOrDefault(c, 0) + 1);
             }
-            // It checks for equal frequencies
-            for (char c : nm.keySet()) {
-                if (!nm.get(c).equals(kk.get(c))) {
-                    return false;
-                }
-            }
-            return true;
+            // It checks for equal frequencies by comparing key-value pairs of two hashmaps
+            return nm.equals(kk);
         }
     }
 }