Implement delete() for light methods

compiler/jet.as.java.psi/src/org/jetbrains/jet/asJava/wrappers/JetClsMethodImpl.java

@@ -19,6 +19,7 @@ package org.jetbrains.jet.asJava.wrappers;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.impl.compiled.ClsMethodImpl;
 import com.intellij.psi.impl.java.stubs.PsiMethodStub;
+import com.intellij.util.IncorrectOperationException;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.lang.psi.JetDeclaration;
 import org.jetbrains.jet.lang.resolve.java.JetClsMethod;
@@ -47,4 +48,9 @@ public class JetClsMethodImpl extends ClsMethodImpl implements JetClsMethod {
     public JetDeclaration getOrigin() {
         return (JetDeclaration) origin;
     }
+
+    @Override
+    public void delete() throws IncorrectOperationException {
+        origin.delete();
+    }
 }