Minor. Refine implicit receiver for destructuring scope

Actually it should not be very important, but for sake of consistency
we should use null receiver even if we have one in an outer scope

This is a post-review fix

compiler/resolution/src/org/jetbrains/kotlin/resolve/scopes/utils/ScopeUtils.kt

@@ -204,7 +204,7 @@ fun LexicalScope.replaceImportingScopes(importingScopeChain: ImportingScope?): L
 fun LexicalScope.createScopeForDestructuring(newReceiver: ReceiverParameterDescriptor?): LexicalScope {
     return LexicalScopeImpl(
             parent, ownerDescriptor, isOwnerDescriptorAccessibleByLabel,
-            newReceiver ?: implicitReceiver,
+            newReceiver,
             LexicalScopeKind.FUNCTION_HEADER_FOR_DESTRUCTURING
     )
 }