Minor: Use kotlin.lazy instead of kotlin.Delegates.lazy in KtPsiFactory.CallableBuilder

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

@@ -1,14 +1,12 @@
-import kotlin.properties.Delegates
-
 // WITH_RUNTIME
 // EXTRACTION_TARGET: lazy property
 
 val n: Int = 1
 
-private val i: Int by Delegates.lazy {
+private val i: Int by lazy {
     n + 1
 }
 
 fun foo(): Int {
     return i
-}
+}