Tests: remove obsolete txt dumps in CompileKotlin...Test

Check that the client code compiles against the "broken" classpath
instead. Descriptor text dump is a part of the obsolete test
infrastructure and should not be used anymore.

compiler/testData/compileKotlinAgainstCustomBinaries/sameLibraryTwiceInClasspath/source.kt

@@ -0,0 +1,9 @@
+package test
+
+import testing.*
+
+val testObjectProperty = TopLevelObject
+
+val outer = Outer()
+val inn3r = Outer().Inner()
+val nested = Outer.Nested()