[Test] Disable UNUSED_* diagnostics in tests which are not belong to contolFlowAnalysis suite

compiler/testData/diagnostics/tests/inference/fixVariableToNothing.kt

@@ -1,15 +1,14 @@
-
 // completion order here: X, Y, WHEN_VARIABLE
 fun <T> List<T>.optimizeReadOnlyList() = when (size) {
     0 -> emptyList() // here type variable Y will be fixed to Nothing
     1 -> listOf(this[0])
     else -> this
 }
-fun <X> listOf(<!UNUSED_PARAMETER!>element<!>: X): List<X> = TODO()
+fun <X> listOf(element: X): List<X> = TODO()
 fun <Y> emptyList(): List<Y> = TODO()
 
 
 fun test(l: List<String>): List<String> {
     val foo = l.optimizeReadOnlyList()
     return foo
-}
+}