Don't ask to force-push if the remote rejected updates

Lazygit has two ways to decide whether it needs to ask the user to force-push:
1. if it knows ahead of time that the push will fail because the branch has
diverged, by looking at the incoming/outgoing information that it shows as ↑3↓7.
2. by examining the error that comes back when the push has failed.

The second situation should happen only rarely, because lazygit fetches every
minute by default, so the ↑3↓7 information is usually up to date. It might not
be if the user turned off auto-fetch (or increased the auto-fetch interval).
However, in this case it's almost always harmful to prompt the user to
force-push, because we know that the reason for diverging is that something was
pushed to the remote, and we would wipe it out by force-pushing. In such a
situation, the more likely user action is to pull the remote changes and then
push normally again.

So just remove the second prompt, and replace it by a better error message when
we detect that updates were rejected remotely.

A little bit of history archeology reveals that the second prompt was added at a
time where we didn't have the first one yet, so at that time it made sense to
have it; but when the first prompt was added, we should have removed the second.

pkg/gui/controllers/sync_controller.go

@@ -196,23 +196,8 @@ func (self *SyncController) pushAux(currentBranch *models.Branch, opts pushOpts)
 				SetUpstream:    opts.setUpstream,
 			})
 		if err != nil {
-			if !opts.force && strings.Contains(err.Error(), "Updates were rejected") {
-				forcePushDisabled := self.c.UserConfig.Git.DisableForcePushing
-				if forcePushDisabled {
-					_ = self.c.ErrorMsg(self.c.Tr.UpdatesRejectedAndForcePushDisabled)
-					return nil
-				}
-				_ = self.c.Confirm(types.ConfirmOpts{
-					Title:  self.c.Tr.ForcePush,
-					Prompt: self.forcePushPrompt(),
-					HandleConfirm: func() error {
-						newOpts := opts
-						newOpts.force = true
-
-						return self.pushAux(currentBranch, newOpts)
-					},
-				})
-				return nil
+			if strings.Contains(err.Error(), "Updates were rejected") {
+				return self.c.ErrorMsg(self.c.Tr.UpdatesRejected)
 			}
 			return err
 		}