Added note that explains that unused code was removed.

app/src/main/java/org/schabi/newpipe/util/urlfinder/PatternsCompat.java

@@ -24,6 +24,10 @@ import java.util.regex.Pattern;
  * Commonly used regular expression patterns.
  */
 public final class PatternsCompat {
+    //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+    // CHANGED: Removed unused code //
+    //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
     public static final Pattern IP_ADDRESS = Pattern.compile(
             "((25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9])\\.(25[0-5]|2[0-4]"
                     + "[0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1]"