Bug 437392 - Remove LaunchBar from CDT repo.

It is now located in the cdt/org.eclipse.launchbar repo. The intention
is to move it to a project lower down the stack so it can be reused
accross Eclipse.

Change-Id: I9d623fa372fcf6e345ba68a8830db190a75e0d28
Reviewed-on: https://git.eclipse.org/r/38266
Tested-by: Hudson CI
Reviewed-by: Doug Schaefer <dschaefer@qnx.com>