Safe delete: when invoking on actual, delete expect & actual neighbors

So #KT-15666 Fixed

idea/testData/refactoring/safeDeleteMultiModule/byImplFun/after/Common/src/test/test.kt

@@ -1,7 +1,5 @@
 package test
 
-expect fun foo(n: Int)
-
 fun test() {
     foo(1)
 }

idea/testData/refactoring/safeDeleteMultiModule/byImplFun/after/JVM/src/test/test.kt

@@ -1,9 +1,5 @@
 package test
 
-actual fun foo(n: Int) {
-
-}
-
 fun test() {
     foo(1)
 }