Remove remove_bid_after_accept setting (#1100)

* Remove "Remove bid on accept" setting and remove bids after PIREP was filed

fixes #1039

* Add migration to remove setting from database

* fix migration naming and remove obsolete code

Co-authored-by: Andreas Palm <ap@ewsp.de>

app/Services/BidService.php

@@ -169,10 +169,6 @@ class BidService extends Service
      */
     public function removeBidForPirep(Pirep $pirep)
     {
-        if (!setting('pireps.remove_bid_on_accept')) {
-            return;
-        }
-
         $flight = $pirep->flight;
         if (!$flight) {
             return;