Remove support for deprecated git_data_dir setting structure
In !1363 (merged) we introduced a new structure to specify git_data_dirs. We left compatibility for the old version. In 10.0, it's reasonable to remove that compatibility.
In !1363 (merged) we introduced a new structure to specify git_data_dirs. We left compatibility for the old version. In 10.0, it's reasonable to remove that compatibility.