[K/N][test] Remove obsolete test on KlibInstall task

This test relied on the almost obsolete klib installation feature.
General linkage with a libraries already covered by various tests.

kotlin-native/backend.native/tests/build.gradle

@@ -44,8 +44,6 @@ ext.testOutputRoot = rootProject.file("test.output").absolutePath
 ext.platformManager = project.project(":kotlin-native").platformManager
 ext.target = platformManager.targetManager(project.testTarget).target
 
-ext.testLibraryDir = "${ext.testOutputRoot}/klib/platform/${project.target.name}"
-
 // Add executor to run tests depending on a target
 // NOTE: If this persists in a gradle daemon, environment update (e.g. an Xcode update) may lead to execution failures.
 project.extensions.executor = ExecutorServiceKt.create(project)
@@ -2118,20 +2116,6 @@ standaloneTest("link_default_libs") {
     UtilsKt.dependsOnPlatformLibs(it)
 }
 
-//standaloneTest("link_testLib_explicitly1") {
-//    // there is no testLibrary for cross targets yet.
-//    enabled = project.target.name == project.hostName
-//    dependsOn installTestLib
-//    useGoldenData = true
-//    source = "link/testLib_explicitly1.kt"
-//    // We force library inclusion, so need to see the warning banner.
-//    flags = ['-l', 'testLibrary', '-r', testLibraryDir]
-//    doLast {
-//        def file = new File("$testLibraryDir/testLibrary")
-//        file.deleteDir()
-//    }
-//}
-
 linkTest("no_purge_for_dependencies") {
     useGoldenData = true
     source = "link/purge1/prog.kt"

kotlin-native/backend.native/tests/testLibrary/kotlin/test_platform_lib.kt

@@ -1,14 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the LICENSE file.
- */
-
-package test.konan.platform
-
-fun produceMessage() {
-    println("""This is a side effect of a test library linked into the binary.
-You should not be seeing this.
-""")
-}
-
-val x: Unit = produceMessage()