When you use GIT branching becomes… attractive, maybe even addictive. Which is fine… then (as happened yesterday) you find that a branch really didn’t help in any way and you would like to delete that branch and pretend it never happened 🙂
I’m using the GIT capability of Visual Studio Online and was stumped with how to delete the branch. I managed to remove it from my local repository with ease – but not from Visual Studio Online.
The solution turned out to be very simple but (to me anyway) was not obvious.
Install GIT for Windows. Fire up the GIT Gui and then select the Delete Branch option from the Remote menu. Simple.
IUpdateable from Eric Nelson 
Dude, that’s really helpful, but were you using visual studio online for your origin? Scanning the origin doesn’t work for me, it doesn’t seem to want to recognise my credentials, not sure why it’s not working or how to fix it.
Yo, me again, no need to use a git client, you first unpublish the branch at the origin (I’m using VSO) then delete the branch locally: http://msdn.microsoft.com/en-us/library/vstudio/jj190809.aspx#remove
Hope that’s helpful