[K/N] Deprecate and remove from supported list relaxed memory model

kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/KotlinNativeTest.kt

@@ -314,11 +314,7 @@ open class KonanLocalTest : KonanTest() {
             // TODO: as for now it captures output only in the driver task.
             // It should capture output from the build task using Gradle's LoggerManager and LoggerOutput
             val compilationLog = project.file("$executable.compilation.log").readText()
-            // TODO: ugly hack to fix irrelevant warnings.
-            val filteredCompilationLog = compilationLog.split('\n').filter {
-                it != "warning: relaxed memory model is not yet fully functional"
-            }.joinToString(separator = "\n")
-            output.stdOut = filteredCompilationLog + output.stdOut
+            output.stdOut = compilationLog + output.stdOut
         }
         output.check()
         output.print()