D6553: shelve: move shelve extension to core

[yuja (Yuya Nishihara)]

yuja added a comment.


  Need to update `extensions._builtin` so the shelve "extension" is silently
  ignored.
  
  Please send a follow up.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D6553/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D6553

To: navaneeth.suresh, #hg-reviewers, pulkit
Cc: yuja, martinvonz, pulkit, Kwan, mjpieters, mercurial-devel