Use removeIf() for a more efficient implementation which also deals with

the PMD empty while loop error.

Author: Gary Gregory

src/main/java/org/apache/commons/io/monitor/FileAlterationObserver.java

@@ -444,9 +444,7 @@ private File[] listFiles(final File file) {
      */
     public void removeListener(final FileAlterationListener listener) {
         if (listener != null) {
-            while (listeners.remove(listener)) {
-                // empty
-            }
+            listeners.removeIf(listener::equals);
         }
     }