removes all anonymous inner classes (ReactiveX#5177)

Author: SleimanJneidi

src/main/java/io/reactivex/Scheduler.java

@@ -131,16 +131,7 @@ public Disposable scheduleDirect(@NonNull Runnable run, long delay, @NonNull Tim
 
         final Runnable decoratedRun = RxJavaPlugins.onSchedule(run);
 
-        w.schedule(new Runnable() {
-            @Override
-            public void run() {
-                try {
-                    decoratedRun.run();
-                } finally {
-                    w.dispose();
-                }
-            }
-        }, delay, unit);
+        w.schedule(new DisposeTask(decoratedRun, w), delay, unit);
 
         return w;
     }
@@ -440,4 +431,23 @@ public boolean isDisposed() {
             return disposed;
         }
     }
+
+    static final class DisposeTask implements Runnable {
+        final Runnable decoratedRun;
+        final Worker w;
+
+        DisposeTask(Runnable decoratedRun, Worker w) {
+            this.decoratedRun = decoratedRun;
+            this.w = w;
+        }
+
+        @Override
+        public void run() {
+            try {
+                decoratedRun.run();
+            } finally {
+                w.dispose();
+            }
+        }
+    }
 }