chore: clean up deprecated Sora settings after rebase

backend/internal/handler/setting_handler.go

@@ -56,7 +56,6 @@ func (h *SettingHandler) GetPublicSettings(c *gin.Context) {
 		LinuxDoOAuthEnabled:              settings.LinuxDoOAuthEnabled,
 		OIDCOAuthEnabled:                 settings.OIDCOAuthEnabled,
 		OIDCOAuthProviderName:            settings.OIDCOAuthProviderName,
-		SoraClientEnabled:                settings.SoraClientEnabled,
 		BackendModeEnabled:               settings.BackendModeEnabled,
 		Version:                          h.version,
 	})