Remove existing unneeded @ReportPolymorphism

Author: bjfish

src/main/java/org/truffleruby/core/encoding/EncodingNodes.java

@@ -58,15 +58,13 @@
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.Fallback;
-import com.oracle.truffle.api.dsl.ReportPolymorphism;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.profiles.BranchProfile;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 
 @CoreModule(value = "Encoding", isClass = true)
 public abstract class EncodingNodes {
 
-    @ReportPolymorphism
     @CoreMethod(names = "ascii_compatible?")
     public abstract static class AsciiCompatibleNode extends CoreMethodArrayArgumentsNode {
 
@@ -432,7 +430,6 @@ protected ImmutableRubyString localeCharacterMap(
         }
     }
 
-    @ReportPolymorphism
     @CoreMethod(names = "dummy?")
     public abstract static class DummyNode extends CoreMethodArrayArgumentsNode {