Remove obsolete and not relevant to stdlib tests

libraries/stdlib/test/js/SimpleTest.kt

@@ -1,19 +0,0 @@
-package testPackage
-
-import org.junit.Test as test
-import kotlin.test.*
-
-class SimpleTest {
-
-    public fun testFoo() {
-        val name = "world"
-        val message = "hello $name!"
-        assertEquals("hello world!", message)
-    }
-
-    @test fun cheese() {
-        val name = "world"
-        val message = "bye $name!"
-        assertEquals("bye world!", message)
-    }
-}