Drop ReturnInstruction

compiler/frontend/src/org/jetbrains/jet/lang/cfg/pseudocode/ReturnInstruction.java

@@ -1,20 +0,0 @@
-/*
- * Copyright 2010-2013 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.jet.lang.cfg.pseudocode;
-
-public interface ReturnInstruction extends Instruction, JetElementInstruction {
-}

compiler/frontend/src/org/jetbrains/jet/lang/cfg/pseudocode/ReturnNoValueInstruction.java

@@ -20,7 +20,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.lang.cfg.Label;
 import org.jetbrains.jet.lang.psi.JetElement;
 
-public class ReturnNoValueInstruction extends AbstractJumpInstruction implements ReturnInstruction {
+public class ReturnNoValueInstruction extends AbstractJumpInstruction {
     public ReturnNoValueInstruction(@NotNull JetElement element, LexicalScope lexicalScope, Label targetLabel) {
         super(element, targetLabel, lexicalScope);
     }

compiler/frontend/src/org/jetbrains/jet/lang/cfg/pseudocode/ReturnValueInstruction.java

@@ -20,7 +20,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.lang.cfg.Label;
 import org.jetbrains.jet.lang.psi.JetExpression;
 
-public class ReturnValueInstruction extends AbstractJumpInstruction implements ReturnInstruction {
+public class ReturnValueInstruction extends AbstractJumpInstruction {
     public ReturnValueInstruction(
             @NotNull JetExpression returnExpression,
             @NotNull LexicalScope lexicalScope,