Revert "Docs: Fix Code Example for API connect()" (#1414)

This reverts commit d9c49fa.

docs/api/connect.md

@@ -581,7 +581,7 @@ function mapStateToProps(state) {
 
 const mapStateToProps = (state, ownProps = {}) => {
   console.log(state) // state
-  console.log(ownProps) // undefined
+  console.log(ownProps) // {}
 }
 ```