Remove Gerrit 1.x to 2.x import tools

Its been almost 2 full months since the first release of Gerrit 2.x.
Any administrator still running Gerrit 1.x on Google App Engine must
have converted by now to Gerrit2, and if they haven't, they really
need to consider doing it as soon as possible, as the upgrade path
is already very painful due to schema changes in Gerrit 2.x.

Signed-off-by: Shawn O. Pearce <sop@google.com>
8 files changed