I did the following test on our dev environment:-
1. i create a new site collection of type enterprise wiki 2013.
2. then i went to "site setting>>site action >>manage site features"
3. I activate the "SharePoint Server Publishing" feature.
4.t hen after some time i deactivate the feature.
but now after deactivating the feature, my site collection will have the following problems:-
1. there will always be "Approve" & "Reject" icons under the "page options" tab, even i did not enable content approval and the wiki page status is not pending!!

2. when i edit a wiki page there is not any Save button instead i will be get "Stop Editing" button.

3. also under "Page Options" tab i will get new icons such as "Edit Mobile Page", etc.
So can anyone adivce on this,of course if i enable the feature again i will get these issues fixed .. but why deactivating the feature will not return the situation as it was before activating it ??