From the most recent response to this issue, it seems that the file was removed with the intention that the list of authors could be programmatically generated:

From the most recent response to this issue, it seems that the file was removed with the intention that the list of authors could be programmatically generated: https://github.com/Guake/guake/issues/1703#issuecomment-596500947 https://github.com/Guake/guake/issues/1703#issuecomment-5965... I also see that Gabriel has now been credited in the project’s `README.rst`.