[FIR] NOTHING_TO_OVERRIDE diagnostic

compiler/testData/diagnostics/tests/dataClasses/implementMethodsFromInterface.fir.kt

@@ -1,25 +0,0 @@
-// KT-11306 ABSTRACT_MEMBER_NOT_IMPLEMENTED for data class should inheriting interfaces requiring equals(), hashCode(), or toString()
-
-interface Foo {
-    override fun equals(other: Any?): Boolean
-    override fun hashCode(): Int
-    override fun toString(): String
-}
-
-data class FooImpl(val num: Int) : Foo
-
-data class FooImplSome(val num: Int) : Foo {
-    override fun hashCode() = 42
-}
-
-data class FooImplAll(val num: Int) : Foo {
-    override fun equals(other: Any?) = false
-    override fun hashCode() = 42
-    override fun toString() = "OK"
-}
-
-
-data class WrongSignatures(val num: Int) : Foo {
-    override fun equals(other: WrongSignatures) = false
-    override fun hashCode(): <!RETURN_TYPE_MISMATCH_ON_OVERRIDE!>Boolean<!> = true
-}

compiler/testData/diagnostics/tests/dataClasses/implementMethodsFromInterface.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // KT-11306 ABSTRACT_MEMBER_NOT_IMPLEMENTED for data class should inheriting interfaces requiring equals(), hashCode(), or toString()
 
 interface Foo {