FIR: Mark a pack of tests (53) as FIR_IDENTICAL

compiler/testData/diagnostics/tests/resolve/specialConstructions/multipleSuperClasses.fir.kt

@@ -1,28 +0,0 @@
-// !DIAGNOSTICS: -UNUSED_VARIABLE
-
-interface A
-interface B
-
-interface C: A, B
-interface D: A, B
-interface E: A, B
-
-fun foo(c: C?, d: D?, e: E?) {
-    val test1: A? = c ?: d ?: e
-
-    val test2: B? = if (false) if (true) c else d else e
-
-    val test3: A? = when {
-        true -> c
-        else -> when {
-            true -> d
-            else -> e
-        }
-    }
-
-    val test4: B? = when (1) {
-        1 -> c
-        2 -> d
-        else -> e
-    }
-}

compiler/testData/diagnostics/tests/resolve/specialConstructions/multipleSuperClasses.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 interface A