@beta and @experimental annotations are not longer annotated with itself (#4610)

Author: VictorAlbertos

src/main/java/rx/annotations/Beta.java

@@ -46,6 +46,5 @@
         ElementType.METHOD,
         ElementType.TYPE })
 @Documented
-@Beta
 public @interface Beta {
 }

src/main/java/rx/annotations/Experimental.java

@@ -36,6 +36,5 @@
         ElementType.METHOD,
         ElementType.TYPE })
 @Documented
-@Experimental
 public @interface Experimental {
 }