[elpa] externals/boxy-headings updated (08e3bb8b9c -> 15f54ab24b)

[ELPA Syncer]

elpasync pushed a change to branch externals/boxy-headings.

      from  08e3bb8b9c Moved project
       new  889252f65d Removed unnecessary submodule
       new  15f54ab24b Updated documentation


Summary of changes:
 .gitlab-ci.yml   |  3 ---
 .gitmodules      |  3 ---
 Eldev            | 32 +-------------------------------
 boxy-headings.el |  6 +++---
 deps/boxy        |  1 -
 5 files changed, 4 insertions(+), 41 deletions(-)
 delete mode 100644 .gitmodules
 delete mode 160000 deps/boxy