Extract property: do not add unnecessary extension receiver

#KT-24615 Fixed

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/extractionEngine/extractorUtil.kt

@@ -668,6 +668,12 @@ fun ExtractionGeneratorConfiguration.generateDeclaration(
         }
     }
 
+    if (declaration is KtProperty && declaration.isExtensionDeclaration() && !declaration.isTopLevel) {
+        val receiverTypeReference = (declaration as? KtCallableDeclaration)?.receiverTypeReference
+        receiverTypeReference?.siblings(withItself = false)?.firstOrNull { it.node.elementType == KtTokens.DOT }?.delete()
+        receiverTypeReference?.delete()
+    }
+
     CodeStyleManager.getInstance(descriptor.extractionData.project).reformat(declaration)
 
     return ExtractionResult(this, declaration, duplicateReplacers)

idea/testData/refactoring/introduceProperty/kt24615.kt

@@ -0,0 +1,9 @@
+// EXTRACTION_TARGET: property with getter
+
+open class Base(protected val i: Int)
+
+class Impl(i: Int) : Base(i) {
+    fun foo(): Int {
+        return <selection>2 + 3 + i</selection>
+    }
+}

idea/testData/refactoring/introduceProperty/kt24615.kt.after

@@ -0,0 +1,12 @@
+// EXTRACTION_TARGET: property with getter
+
+open class Base(protected val i: Int)
+
+class Impl(i: Int) : Base(i) {
+    private val i: Int
+        get() = 2 + 3 + i
+
+    fun foo(): Int {
+        return i
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/refactoring/introduce/ExtractionTestGenerated.java

@@ -2927,6 +2927,11 @@ public class ExtractionTestGenerated extends AbstractExtractionTest {
             runTest("idea/testData/refactoring/introduceProperty/kt21530.kt");
         }
 
+        @TestMetadata("kt24615.kt")
+        public void testKt24615() throws Exception {
+            runTest("idea/testData/refactoring/introduceProperty/kt24615.kt");
+        }
+
         @TestMetadata("primaryConstructorParameterReference.kt")
         public void testPrimaryConstructorParameterReference() throws Exception {
             runTest("idea/testData/refactoring/introduceProperty/primaryConstructorParameterReference.kt");