completion: reduce completable command list

The following commands are removed from the complete list:

- annotate             obsolete, discouraged to use
- filter-branch        not often used
- get-tar-commit-id    not often used
- imap-send            not often used
- interpreter-trailers not for interactive use
- name-rev             plumbing, just use git-describe
- p4                   too short and probably not often used (*)
- svn                  same category as p4 (*)
- verify-commit        not often used

(*) to be fair, send-email command which is in the same foreignscminterface
group as svn and p4 does get completion, just because it's used by git
and kernel development. So maybe we should include them.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

command-list.txt

@@ -47,7 +47,7 @@
 # command name                          category [category] [category]
 git-add                                 mainporcelain           worktree
 git-am                                  mainporcelain
-git-annotate                            ancillaryinterrogators          complete
+git-annotate                            ancillaryinterrogators
 git-apply                               plumbingmanipulators            complete
 git-archimport                          foreignscminterface
 git-archive                             mainporcelain
@@ -89,13 +89,13 @@ git-fast-export                         ancillarymanipulators
 git-fast-import                         ancillarymanipulators
 git-fetch                               mainporcelain           remote
 git-fetch-pack                          synchingrepositories
-git-filter-branch                       ancillarymanipulators           complete
+git-filter-branch                       ancillarymanipulators
 git-fmt-merge-msg                       purehelpers
 git-for-each-ref                        plumbinginterrogators
 git-format-patch                        mainporcelain
 git-fsck                                ancillaryinterrogators          complete
 git-gc                                  mainporcelain
-git-get-tar-commit-id                   ancillaryinterrogators          complete
+git-get-tar-commit-id                   ancillaryinterrogators
 git-grep                                mainporcelain           info
 git-gui                                 mainporcelain
 git-hash-object                         plumbingmanipulators
@@ -103,11 +103,11 @@ git-help                                ancillaryinterrogators          complete
 git-http-backend                        synchingrepositories
 git-http-fetch                          synchelpers
 git-http-push                           synchelpers
-git-imap-send                           foreignscminterface             complete
+git-imap-send                           foreignscminterface
 git-index-pack                          plumbingmanipulators
 git-init                                mainporcelain           init
 git-instaweb                            ancillaryinterrogators          complete
-git-interpret-trailers                  purehelpers                     complete
+git-interpret-trailers                  purehelpers
 gitk                                    mainporcelain
 git-log                                 mainporcelain           info
 git-ls-files                            plumbinginterrogators
@@ -125,9 +125,9 @@ git-merge-tree                          ancillaryinterrogators
 git-mktag                               plumbingmanipulators
 git-mktree                              plumbingmanipulators
 git-mv                                  mainporcelain           worktree
-git-name-rev                            plumbinginterrogators           complete
+git-name-rev                            plumbinginterrogators
 git-notes                               mainporcelain
-git-p4                                  foreignscminterface             complete
+git-p4                                  foreignscminterface
 git-pack-objects                        plumbingmanipulators
 git-pack-redundant                      plumbinginterrogators
 git-pack-refs                           ancillarymanipulators
@@ -167,7 +167,7 @@ git-stage                                                               complete
 git-status                              mainporcelain           info
 git-stripspace                          purehelpers
 git-submodule                           mainporcelain
-git-svn                                 foreignscminterface             complete
+git-svn                                 foreignscminterface
 git-symbolic-ref                        plumbingmanipulators
 git-tag                                 mainporcelain           history
 git-unpack-file                         plumbinginterrogators
@@ -178,7 +178,7 @@ git-update-server-info                  synchingrepositories
 git-upload-archive                      synchelpers
 git-upload-pack                         synchelpers
 git-var                                 plumbinginterrogators
-git-verify-commit                       ancillaryinterrogators          complete
+git-verify-commit                       ancillaryinterrogators
 git-verify-pack                         plumbinginterrogators
 git-verify-tag                          ancillaryinterrogators
 gitweb                                  ancillaryinterrogators