ChangeVisibilityFix: remove redundant property setter

#KT-33796 Fixed

idea/testData/quickfix/increaseVisibility/privateSetterToInternal.kt

@@ -0,0 +1,12 @@
+// "Make '<set-attribute>' internal" "true"
+// ACTION: "Make '<set-attribute>' public"
+
+class Demo {
+    var attribute = "a"
+        private set
+}
+
+fun main() {
+    val c = Demo()
+    <caret>c.attribute = "test"
+}

idea/testData/quickfix/increaseVisibility/privateSetterToInternal.kt.after

@@ -0,0 +1,12 @@
+// "Make '<set-attribute>' internal" "true"
+// ACTION: "Make '<set-attribute>' public"
+
+class Demo {
+    var attribute = "a"
+        internal set
+}
+
+fun main() {
+    val c = Demo()
+    c.attribute = "test"
+}

idea/testData/quickfix/increaseVisibility/privateSetterToPublic.kt

@@ -0,0 +1,12 @@
+// "Make '<set-attribute>' public" "true"
+// ACTION: "Make '<set-attribute>' internal"
+
+class Demo {
+    var attribute = "a"
+        private set
+}
+
+fun main() {
+    val c = Demo()
+    <caret>c.attribute = "test"
+}

idea/testData/quickfix/increaseVisibility/privateSetterToPublic.kt.after

@@ -0,0 +1,11 @@
+// "Make '<set-attribute>' public" "true"
+// ACTION: "Make '<set-attribute>' internal"
+
+class Demo {
+    var attribute = "a"
+}
+
+fun main() {
+    val c = Demo()
+    <caret>c.attribute = "test"
+}