[bugfix] don't prevent moved accounts from invalidating their old tokens (#4091)

# Description

Removes the move check from the invalidate token API handler, as moved accounts should be able to delete their old tokens.

closes #4067

## Checklist

- [x] I/we have read the [GoToSocial contribution guidelines](https://codeberg.org/superseriousbusiness/gotosocial/src/branch/main/CONTRIBUTING.md).
- [x] I/we have discussed the proposed changes already, either in an issue on the repository, or in the Matrix chat.
- [x] I/we have not leveraged AI to create the proposed changes.
- [x] I/we have performed a self-review of added code.
- [x] I/we have written code that is legible and maintainable by others.
- [x] I/we have commented the added code, particularly in hard-to-understand areas.
- [ ] I/we have made any necessary changes to documentation.
- [ ] I/we have added tests that cover new code.
- [x] I/we have run tests and they pass locally with the changes.
- [x] I/we have run `go fmt ./...` and `golangci-lint run`.

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4091
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

internal/api/client/tokens/tokeninvalidate.go

@@ -73,10 +73,9 @@ func (m *Module) TokenInvalidatePOSTHandler(c *gin.Context) {
 		return
 	}
 
-	if authed.Account.IsMoving() {
-		apiutil.ForbiddenAfterMove(c)
-		return
-	}
+	// Note that we don't perform a move check,
+	// as even moved accounts should be able to
+	// invalidate their old tokens.
 
 	if _, err := apiutil.NegotiateAccept(c, apiutil.JSONAcceptHeaders...); err != nil {
 		apiutil.ErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), m.processor.InstanceGetV1)