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

compiler/testData/diagnostics/tests/smartCasts/inference/kt2746.kt

@@ -1,10 +1,10 @@
 //KT-2746 Do.smartcasts in inference
 
-class C<T>(<!UNUSED_PARAMETER!>t<!> :T)
+class C<T>(t :T)
 
 fun test1(a: Any) {
     if (a is String) {
-        val <!UNUSED_VARIABLE!>c<!>: C<String> = C(<!DEBUG_INFO_SMARTCAST!>a<!>)
+        val c: C<String> = C(<!DEBUG_INFO_SMARTCAST!>a<!>)
     }
 }
 
@@ -13,6 +13,6 @@ fun <T> f(t :T): C<T> = C(t)
 
 fun test2(a: Any) {
     if (a is String) {
-        val <!UNUSED_VARIABLE!>c1<!>: C<String> = f(<!DEBUG_INFO_SMARTCAST!>a<!>)
+        val c1: C<String> = f(<!DEBUG_INFO_SMARTCAST!>a<!>)
     }
 }