Revert "enhance tests (mostly codegen)" temporarily

This reverts commit 95f9bcbacb.

compiler/tests/org/jetbrains/jet/codegen/AnnotationGenTest.java

@@ -17,7 +17,6 @@
 package org.jetbrains.jet.codegen;
 
 import jet.JetObject;
-import org.jetbrains.jet.lang.resolve.java.CompilerSpecialMode;
 
 import java.lang.annotation.*;
 import java.lang.reflect.Constructor;
@@ -25,13 +24,6 @@ import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 
 public class AnnotationGenTest extends CodegenTestCase {
-
-    @Override
-    protected void setUp() throws Exception {
-        super.setUp();
-        createEnvironmentWithMockJdk(CompilerSpecialMode.JDK_HEADERS);
-    }
-
     public void testPropField() throws NoSuchFieldException, NoSuchMethodException {
         loadText("[Deprecated] var x = 0");
         Class aClass = generateNamespaceClass();