Revert "[MM-37984] Allow Desktop App to authenticate via external providers outside of the app on supported servers (#23795)" (#24039)

This reverts commit abdf4e58c3.

server/channels/app/oauth.go

@@ -431,7 +431,7 @@ func (a *App) newSessionUpdateToken(app *model.OAuthApp, accessData *model.Acces
 	return accessRsp, nil
 }
 
-func (a *App) GetOAuthLoginEndpoint(w http.ResponseWriter, r *http.Request, service, teamID, action, redirectTo, loginHint string, isMobile bool, desktopToken string) (string, *model.AppError) {
+func (a *App) GetOAuthLoginEndpoint(w http.ResponseWriter, r *http.Request, service, teamID, action, redirectTo, loginHint string, isMobile bool) (string, *model.AppError) {
 	stateProps := map[string]string{}
 	stateProps["action"] = action
 	if teamID != "" {
@@ -442,10 +442,6 @@ func (a *App) GetOAuthLoginEndpoint(w http.ResponseWriter, r *http.Request, serv
 		stateProps["redirect_to"] = redirectTo
 	}
 
-	if desktopToken != "" {
-		stateProps["desktop_token"] = desktopToken
-	}
-
 	stateProps[model.UserAuthServiceIsMobile] = strconv.FormatBool(isMobile)
 
 	authURL, err := a.GetAuthorizationCode(w, r, service, stateProps, loginHint)
@@ -456,17 +452,13 @@ func (a *App) GetOAuthLoginEndpoint(w http.ResponseWriter, r *http.Request, serv
 	return authURL, nil
 }
 
-func (a *App) GetOAuthSignupEndpoint(w http.ResponseWriter, r *http.Request, service, teamID string, desktopToken string) (string, *model.AppError) {
+func (a *App) GetOAuthSignupEndpoint(w http.ResponseWriter, r *http.Request, service, teamID string) (string, *model.AppError) {
 	stateProps := map[string]string{}
 	stateProps["action"] = model.OAuthActionSignup
 	if teamID != "" {
 		stateProps["team_id"] = teamID
 	}
 
-	if desktopToken != "" {
-		stateProps["desktop_token"] = desktopToken
-	}
-
 	authURL, err := a.GetAuthorizationCode(w, r, service, stateProps, "")
 	if err != nil {
 		return "", err