contrib/tcsh_completion

share: remove unexpected heading from "verbose" container in help test

`test-gendoc-*.t` have been failing for me since 91425656e2b1 (share:
add documentation about share-safe mode in `hg help -e share`,
2020-11-27) with this kind of output:

```
    --- /usr/local/google/home/martinvonz/hg/tests/test-gendoc-ru.t
    +++ /usr/local/google/home/martinvonz/hg/tests/test-gendoc-ru.t.err
    @@ -2,3 +2,9 @@

       $ $TESTDIR/check-gendoc ru
       checking for parse errors
    +  gendoc.txt:12818: (SEVERE/4) Unexpected section title.
    +
    +  Sharing requirements and configs of source repository with shares
    +  -----------------------------------------------------------------
    +  Exiting due to level-4 (SEVERE) system message.
    +  [1]
```

This patch fixes that.

Differential Revision: https://phab.mercurial-scm.org/D9552

#
# tcsh completion for Mercurial
#
# This file has been auto-generated by tcsh_completion_build.sh for
# Mercurial Distributed SCM (version 1.7.5+157-8a220ae0b2ba)
#
# Copyright (C) 2005 TK Soh.
#
# This is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#

complete hg \
  'n/--cwd/d/' 'n/-R/d/' 'n/--repository/d/' \
  'C/-/( -R --repository \
    --cwd \
    -y --noninteractive \
    -q --quiet \
    -v --verbose \
    --config \
    --debug \
    --debugger \
    --encoding \
    --encodingmode \
    --traceback \
    --time \
    --profile \
    --version \
    -h --help)/' \
  'p/1/(add addremove annotate blame archive \
    backout bisect bookmarks branch branches \
    bundle cat clone commit ci \
    copy cp debugancestor debugbuilddag debugcheckstate \
    debugcommands debugcomplete debugdag debugdata debugdate \
    debugfsinfo debugignore debugindex debugindexdot debuginstall \
    debugpushkey debugrebuildstate debugrename debugrevspec debugsetparents \
    debugstate debugsub debugwalk diff export \
    forget grep heads help identify \
    id import patch incoming in \
    init locate log history manifest \
    merge outgoing out parents paths \
    pull push recover remove rm \
    rename move mv resolve revert \
    rollback root serve showconfig debugconfig \
    status st summary sum tag \
    tags tip unbundle update up \
    checkout co verify version)/'