Merge branch 'sg/sparse-index-not-that-common-a-command'

Drop "git sparse-index" from the list of common commands.

* sg/sparse-index-not-that-common-a-command:
  command-list.txt: remove 'sparse-index' from main help

Author: gitster

command-list.txt

@@ -168,7 +168,7 @@ git-show-index                          plumbinginterrogators
 git-show-ref                            plumbinginterrogators
 git-sh-i18n                             purehelpers
 git-sh-setup                            purehelpers
-git-sparse-checkout                     mainporcelain           worktree
+git-sparse-checkout                     mainporcelain
 git-stash                               mainporcelain
 git-stage                                                               complete
 git-status                              mainporcelain           info