Drop obsolete artifact kotlin-runtime

Remove suppresses used to compile some parts of stdlib
as a non-multiplatform project.

libraries/tools/binary-compatibility-validator/src/test/kotlin/org.jetbrains.kotlin.tools.tests/RuntimePublicAPITest.kt

@@ -17,10 +17,6 @@ class RuntimePublicAPITest {
     @[Rule JvmField]
     val testName = TestName()
 
-    @Test fun kotlinRuntime() {
-        snapshotAPIAndCompare("../../stdlib/runtime/build/libs", "kotlin-runtime", listOf("kotlin.jvm.internal"))
-    }
-
     @Test fun kotlinStdlibRuntimeMerged() {
         snapshotAPIAndCompare("../../stdlib/jvm/build/libs", "kotlin-stdlib", listOf("kotlin.jvm.internal"))
     }