control: remove build-dep on libgtk2.0-bin
control: remove build-dep on libgtk2.0-bin

This has been unneeded since b5f3aec7ccf97b54ad030fb17af51317041933b1 /
https://phabricator.endlessm.com/T4538.

https://phabricator.endlessm.com/T27255

endlessm/eos-theme