With the inclusion of the welding module we have found that there is no editing possible for the OOTB weld symbols to remove the sequence note from the symbol tail. When we contacted tech support with a case we were told this was intended functionality. The actual sequence numbers assigned could vary from the actual production process and many times do.
Prior to the Weld module our weld symbols were 2D symbols on the drawing. Now that we are trying to use the application to have welds in the model we have had to put the model weld annotation features on a layer to hide then duplicate the effort by adding the 2D symbols to the drawing.
We did consider creating the custom weld symbol but that would require regular maintenance and testing with every Creo upgrade.
We would request that Creo product management take the initiative here and edit the ootb symbol to add the sequence as variable text.