Implement "Safe Delete" refactoring for properties

idea/testData/safeDelete/deleteProperty/kotlinProperty/implement5.kt

@@ -0,0 +1,10 @@
+trait A {
+    val <caret>foo: String
+}
+
+class B: A {
+    override val foo: String
+        get() {
+            return "B"
+        }
+}

idea/testData/safeDelete/deleteProperty/kotlinProperty/implement5.kt.after

@@ -0,0 +1,5 @@
+trait A {
+}
+
+class B: A {
+}

idea/testData/safeDelete/deleteProperty/kotlinProperty/implement6.kt

@@ -0,0 +1,13 @@
+trait A {
+    var <caret>foo: String
+}
+
+class B: A {
+    override val foo: String
+        get() {
+            return "B"
+        }
+        set(value: String) {
+
+        }
+}

idea/testData/safeDelete/deleteProperty/kotlinProperty/implement6.kt.after

@@ -0,0 +1,5 @@
+trait A {
+}
+
+class B: A {
+}

idea/testData/safeDelete/deleteProperty/kotlinProperty/implement7.kt

@@ -0,0 +1,14 @@
+trait A {
+    val <caret>foo: String
+}
+
+trait Z {
+    val foo: String
+}
+
+class B: A, Z {
+    override val foo: String
+        get() {
+            return "B"
+        }
+}

idea/testData/safeDelete/deleteProperty/kotlinProperty/implement7.kt.after

@@ -0,0 +1,13 @@
+trait A {
+}
+
+trait Z {
+    val foo: String
+}
+
+class B: A, Z {
+    override val foo: String
+        get() {
+            return "B"
+        }
+}

idea/testData/safeDelete/deleteProperty/kotlinProperty/implement8.kt

@@ -0,0 +1,17 @@
+trait A {
+    var <caret>foo: String
+}
+
+trait Z {
+    var foo: String
+}
+
+class B: A, Z {
+    override val foo: String
+        get() {
+            return "B"
+        }
+        set(value: String) {
+
+        }
+}

idea/testData/safeDelete/deleteProperty/kotlinProperty/implement8.kt.after

@@ -0,0 +1,16 @@
+trait A {
+}
+
+trait Z {
+    var foo: String
+}
+
+class B: A, Z {
+    override val foo: String
+        get() {
+            return "B"
+        }
+        set(value: String) {
+
+        }
+}