Old backing field with dollar is now forbidden

idea/testData/intentions/moveAssignmentToInitializer/backingField.kt

@@ -1,9 +0,0 @@
-class A {
-    var a: Int
-    var b: Int
-
-    init {
-        <caret>$a = 1
-        b = 2
-    }
-}

idea/testData/intentions/moveAssignmentToInitializer/backingField.kt.after

@@ -1,8 +0,0 @@
-class A {
-    var a: Int =<caret> 1
-    var b: Int
-
-    init {
-        b = 2
-    }
-}