Remove usage of git from gemspec

Author: Pirate Praveen <praveen@debian.org>
Gbp-Pq: Name 001-remove-git-in-gemspec.patch

ruby-hamlit (2.15.1-1) unstable; urgency=medium

  * Reupload to unstable
  * Bump Standards-Version to 4.6.0 (no changes needed)
  * New upstream version 2.15.1
  * Refresh patches

[dgit import unpatched ruby-hamlit 2.15.1-1]

Import ruby-hamlit_2.15.1.orig.tar.gz

[dgit import orig ruby-hamlit_2.15.1.orig.tar.gz]

Import ruby-hamlit_2.15.1-1.debian.tar.xz

[dgit import tarball ruby-hamlit 2.15.1-1 ruby-hamlit_2.15.1-1.debian.tar.xz]