[libunwind][doc] Remove reference to Phabricator from the landing page

GitOrigin-RevId: fc364e26845ce5529caf9f88abcc5a5531d1f59f
1 file changed
tree: 1d1a385886eb6e0429e018663a1c4c14df2dc70f
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT