Simplify a few operations on streams

Author: sungshik

src/test/java/engineering/swat/watch/TestHelper.java

@@ -102,19 +102,19 @@ private Events(Stream<WatchEvent> stream) {
             }
 
             public boolean any() {
-                return stream.anyMatch(e -> true);
+                return stream.findAny().isPresent();
             }
 
             public boolean any(WatchEvent event) {
                 return stream.anyMatch(e -> WatchEvent.areEquivalent(e, event));
             }
 
             public boolean none() {
-                return stream.noneMatch(e -> true);
+                return !any();
             }
 
             public boolean none(WatchEvent event) {
-                return stream.noneMatch(e -> WatchEvent.areEquivalent(e, event));
+                return !any(event);
             }
 
             public Events kind(WatchEvent.Kind... kinds) {