The ribbon comes from an xml file contained inside the addin. It is possible to edit it but it can't be edited via the Word Customize Ribbon functionality.
You have two options to remove the Ribbon tab:
1. I would be selective about loading the addin. If you don't need it, don't load it. It isn't something that most users would need on a daily basis.
2. You can edit the Ribbon code - apparently
it isn't rocket science.
If you do choose option 2 and can see the CustomUI code the line you will need to change is
Code:
<tab id="GMBatchProcessTab" insertAfterMso="TabInsert" getLabel="GMBatch_getLabel" visible="False" >