linux-next: removal of the kgdb tree

From: Stephen Rothwell
Date: Wed Mar 09 2016 - 00:16:57 EST

Hi Jason,

I noticed that the kgdb tree

git:// branch kgdb-next

has not been updated since March 2015. I am going to remove it from
linux-next tomorrow unless I hear that it may be useful. It can always
be easily added back if it proves useful in the future.

Stephen Rothwell