Fix incorrect merge conflict resolution in `ProtectedBranches::ApiUpdateService`

We have separate methods to delete redundant CE/EE access levels. So,
either `delete_redundant_access_levels` or
`delete_redundant_ee_access_levels` needs to be called, not both (as was
the case here).

app/services/protected_branches/api_update_service.rb

@@ -11,7 +11,6 @@ module ProtectedBranches
       @protected_branch = protected_branch
 
       protected_branch.transaction do
-        delete_redundant_access_levels
         delete_redundant_ee_access_levels
 
         case @developers_can_push