kernelshark: Remove the old GTK+ version

The GTK+ version of KernelSharkk is obsolete. It shall forever live in the
git archives, but there's no reason to have it live in the workspace. The Qt
version is now the official version of KernelShark.

  RIP GTK+ KernelShark, you shall long be remembered.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
27 files changed