== turned into a safe-call

compiler/testData/diagnostics/tests/delegatedProperty/redundantSetter.kt

@@ -1,14 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 var a: Int by Delegate()
   <!ACCESSOR_FOR_DELEGATED_PROPERTY!>get() = 1<!>
   <!ACCESSOR_FOR_DELEGATED_PROPERTY!>set(i) {}<!>
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 
-  fun set(t: Any?, p: PropertyMetadata, i: Int) {
-    t.equals(p) || i.equals(null)  // to avoid UNUSED_PARAMETER warning
-  }
+  fun set(t: Any?, p: PropertyMetadata, i: Int) {}
 }