removed bogus test case for KT-2355 which isn't an issue any more

js/js.tests/test/org/jetbrains/k2js/test/semantics/StringTemplatesTest.java

@@ -22,10 +22,6 @@ public final class StringTemplatesTest extends AbstractExpressionTest {
         super("stringTemplates/");
     }
 
-    public void TODO_testObjectWithExtensionToString() throws Exception {
-        fooBoxIsValue("a = abcX, b = defX");
-    }
-
     public void testObjectWithToString() throws Exception {
         fooBoxIsValue("a = abcS, b = defS");
     }

js/js.translator/testFiles/expression/stringTemplates/cases/objectWithExtensionToString.kt

@@ -1,15 +0,0 @@
-package foo
-
-class Foo(val name: String) {
-}
-
-public fun Foo.toString(): String {
-  return name + "X"
-}
-
-fun box(): String {
-    val a = Foo("abc")
-    val b = Foo("def")
-    val message = "a = $a, b = $b"
-    return message
-}