Get rid of FIELD_IDENTIFIER at syntax level, two errors dropped, a set of tests fixed / deleted #KT-9539 Fixed

idea/testData/quickfix/variables/changeToPropertyName/abstractProperty.kt

@@ -1,5 +0,0 @@
-// "Change '$foo' to 'foo'" "true"
-abstract class Foo {
-    abstract var foo : String
-    fun bar() = <caret>$foo + "bar"
-}

idea/testData/quickfix/variables/changeToPropertyName/abstractProperty.kt.after

@@ -1,5 +0,0 @@
-// "Change '$foo' to 'foo'" "true"
-abstract class Foo {
-    abstract var foo : String
-    fun bar() = <caret>foo + "bar"
-}

idea/testData/quickfix/variables/changeToPropertyName/abstractPropertyThis.kt

@@ -1,5 +0,0 @@
-// "Change '$bar' to 'bar'" "true"
-abstract class Bar {
-    abstract var bar : String
-    fun foo() = "foo" + this.<caret>$bar
-}

idea/testData/quickfix/variables/changeToPropertyName/abstractPropertyThis.kt.after

@@ -1,5 +0,0 @@
-// "Change '$bar' to 'bar'" "true"
-abstract class Bar {
-    abstract var bar : String
-    fun foo() = "foo" + this.<caret>bar
-}

idea/testData/quickfix/variables/changeToPropertyName/customAccessors.kt

@@ -1,7 +0,0 @@
-// "Change '$foo' to 'foo'" "true"
-class A {
-    val foo : Int
-        get() = 5
-    val bar : Int
-        get() = $<caret>foo
-}

idea/testData/quickfix/variables/changeToPropertyName/customAccessors.kt.after

@@ -1,7 +0,0 @@
-// "Change '$foo' to 'foo'" "true"
-class A {
-    val foo : Int
-        get() = 5
-    val bar : Int
-        get() = <caret>foo
-}

idea/testData/quickfix/variables/changeToPropertyName/inaccessibleBackingField.kt

@@ -1,5 +0,0 @@
-// "Change '$a' to 'a'" "true"
-val a = 5
-class A {
-    val b = <caret>$a
-}

idea/testData/quickfix/variables/changeToPropertyName/inaccessibleBackingField.kt.after

@@ -1,5 +0,0 @@
-// "Change '$a' to 'a'" "true"
-val a = 5
-class A {
-    val b = <caret>a
-}

idea/testData/quickfix/variables/changeToPropertyName/inaccessibleBackingFieldQualified.kt

@@ -1,6 +0,0 @@
-// "Change '$a' to 'a'" "true"
-package foo
-val a = 5
-class A {
-    val b = foo.<caret>$a
-}

idea/testData/quickfix/variables/changeToPropertyName/inaccessibleBackingFieldQualified.kt.after

@@ -1,6 +0,0 @@
-// "Change '$a' to 'a'" "true"
-package foo
-val a = 5
-class A {
-    val b = foo.<caret>a
-}