Remove unused stale branches #67
Description
There are a large number of stale branches: https://github.com/epics-modules/xspress3/branches/stale
It looks like they are all merged except for the following (and ignoring the gh-pages branch):
- dls-v2
- no-erase (but only 2 commits)
I think at least the majority of these should be deleted. The DLS branch is likely very out of date too so not sure if this is useful - they have their own fork of this AreaDetector module which has diverged from this one.