[PATCH] Remove --allow-empty from the git-commit synopsis

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

The --allow-empty option is too rarley used to warrant being displayed
in the SYNOPSIS. It should only be mentioned in the main body of the
documentation like --porcelain.

The issue was raised in the thread discussing the new
--allow-empty-message option (see 1aadbfad) by Jeff King
<peff@peff.net>:

    http://marc.info/?l=git&m=127054334121604

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 Documentation/git-commit.txt |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index 64fb458..ed2cd95 100644
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -10,9 +10,8 @@ SYNOPSIS
 [verse]
 'git commit' [-a | --interactive] [-s] [-v] [-u<mode>] [--amend] [--dry-run]
 	   [(-c | -C) <commit>] [-F <file> | -m <msg>] [--reset-author]
-	   [--allow-empty] [--no-verify] [-e] [--author=<author>]
-	   [--date=<date>] [--cleanup=<mode>] [--status | --no-status] [--]
-	   [[-i | -o ]<file>...]
+	   [--no-verify] [-e] [--author=<author>] [--date=<date>]
+	   [--cleanup=<mode>] [--status | --no-status] [--] [[-i | -o ]<file>...]
 
 DESCRIPTION
 -----------
-- 
1.7.0.4.298.gc81d