Remove some unused code (#1521)

src/main/java/carpet/fakes/ExperienceOrbInterface.java

@@ -1,10 +0,0 @@
-package carpet.fakes;
-
-public interface ExperienceOrbInterface
-{
-    int getCombineDelay();
-    void setCombineDelay(int what);
-    void setAmount(int what);
-    int getCount();
-    void setCount(int i);
-}