Revert "enhance tests (mostly codegen)" temporarily

This reverts commit 95f9bcbacb.

compiler/tests/org/jetbrains/jet/resolve/ExtensibleResolveTestCase.java

@@ -20,7 +20,6 @@ import org.jetbrains.annotations.NonNls;
 import org.jetbrains.jet.JetLiteFixture;
 import org.jetbrains.jet.JetTestUtils;
 import org.jetbrains.jet.lang.psi.JetFile;
-import org.jetbrains.jet.lang.resolve.java.CompilerSpecialMode;
 
 import java.util.List;
 
@@ -33,9 +32,6 @@ public abstract class ExtensibleResolveTestCase extends JetLiteFixture {
     @Override
     protected void setUp() throws Exception {
         super.setUp();
-
-        createEnvironmentWithMockJdk(CompilerSpecialMode.STDLIB);
-
         expectedResolveData = getExpectedResolveData();
     }