Drop tests with obsolete assumption

DefaultImpls classes are not visible in IDE no more because they are inner.

compiler/testData/cli/jvm/wrongAbiVersionLib/src/TraitWithDefault.kt

@@ -1,5 +0,0 @@
-package wrong
-
-interface TraitWithDefault {
-    fun foo() = 1
-}

idea/tests/org/jetbrains/kotlin/idea/decompiler/AbstractInternalCompiledClassesTest.kt

@@ -43,24 +43,6 @@ public abstract class AbstractInternalCompiledClassesTest : JetLightCodeInsightF
     private fun isClassOfKind(kind: KotlinClass.Kind) : VirtualFile.() -> Boolean =
             isFileWithHeader { it.classKind == kind }
 
-    protected fun doTestTraitImplClassIsVisibleAsJavaClass() {
-        val project = getProject()
-        doTest("trait impl", isSyntheticClassOfKind(TRAIT_IMPL)) {
-            val psiFile = PsiManager.getInstance(project).findFile(this)!!
-            Assert.assertTrue("Should not be kotlin file",
-                              psiFile !is JetClsFile)
-            Assert.assertTrue("Should be java file, was ${psiFile.javaClass.getSimpleName()}",
-                              psiFile is ClsFileImpl)
-
-            val decompiledPsiFile = (psiFile as PsiCompiledFile).getDecompiledPsiFile()!!
-            Assert.assertTrue("Should be java decompiled file, was ${decompiledPsiFile.javaClass.getSimpleName()}",
-                              decompiledPsiFile is PsiJavaFile)
-            val classes = (decompiledPsiFile as PsiJavaFile).getClasses()
-            Assert.assertTrue("Should have some decompiled text",
-                              classes.size() == 1 && classes[0].getName()!!.endsWith(JvmAbi.DEFAULT_IMPLS_SUFFIX))
-        }
-    }
-
     protected fun doTestNoFilesAreBuiltForSyntheticClass(kind: KotlinSyntheticClass.Kind): Unit =
             doTestNoClassFilesAreBuiltFor(kind.toString(), isSyntheticClassOfKind(kind))
 

idea/tests/org/jetbrains/kotlin/idea/decompiler/InternalCompiledClassesTest.kt

@@ -47,8 +47,6 @@ public class InternalCompiledClassesTest : AbstractInternalCompiledClassesTest()
         ClassFileViewProvider.isInnerClass(this)
     }
 
-    fun testTraitImplClassIsVisibleAsJavaClass() = doTestTraitImplClassIsVisibleAsJavaClass()
-
     override fun getProjectDescriptor(): LightProjectDescriptor {
         return JdkAndMockLibraryProjectDescriptor(TEST_DATA_PATH, /* withSources = */ false)
     }

idea/tests/org/jetbrains/kotlin/idea/decompiler/textBuilder/DecompiledTextForWrongAbiVersionTest.kt

@@ -38,8 +38,6 @@ public class DecompiledTextForWrongAbiVersionTest : AbstractInternalCompiledClas
 
     fun testPackagePartIsInvisibleWrongAbiVersion() = doTestNoPsiFilesAreBuiltForSyntheticClass(PACKAGE_PART)
 
-    fun testTraitImplClassIsVisibleAsJavaClassWrongAbiVersion() = doTestTraitImplClassIsVisibleAsJavaClass()
-
     fun testAnonymousFunctionIsInvisibleWrongAbiVersion() = doTestNoPsiFilesAreBuiltForSyntheticClass(ANONYMOUS_FUNCTION)
 
     fun testClassWithWrongAbiVersion() = doTest("ClassWithWrongAbiVersion")