lineage: Remove no longer used commented repositories

* There has been no indication since lineage-15.0 bringup
  that these repositories are coming back, so remove them

Change-Id: I2026e35d4b60d1ea2430d1df651fcc45bbf1deb8
1 file changed
tree: 5495ec87cc30176a37b19e092dc4fa77b3e26f61
  1. snippets/
  2. default.xml
  3. README.mkdn