doc: remote author/documentation sections from more pages

We decided at 48bb914e (doc: drop author/documentation sections from
most pages, 2011-03-11) to remove "author" and "documentation"
sections from our documentation.  Remove a few stragglers.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-column.txt

@@ -43,11 +43,6 @@ OPTIONS
 --padding=<N>::
 	The number of spaces between columns. One space by default.
 
-
-Author
-------
-Written by Nguyen Thai Ngoc Duy <pclouds@gmail.com>
-
 GIT
 ---
 Part of the linkgit:git[1] suite

Documentation/git-for-each-ref.txt

@@ -219,14 +219,6 @@ eval=`git for-each-ref --shell --format="$fmt" \
 eval "$eval"
 ------------
 
-Author
-------
-Written by Junio C Hamano <gitster@pobox.com>.
-
-Documentation
--------------
-Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
-
 SEE ALSO
 --------
 linkgit:git-show-ref[1]

Documentation/git-http-backend.txt

@@ -263,14 +263,6 @@ identifying information of the remote user who performed the push.
 All CGI environment variables are available to each of the hooks
 invoked by the 'git-receive-pack'.
 
-Author
-------
-Written by Shawn O. Pearce <spearce@spearce.org>.
-
-Documentation
---------------
-Documentation by Shawn O. Pearce <spearce@spearce.org>.
-
 GIT
 ---
 Part of the linkgit:git[1] suite

Documentation/git-notes.txt

@@ -375,16 +375,6 @@ does not match any refs is silently ignored.
 If not set in the environment, the list of notes to copy depends
 on the `notes.rewrite.<command>` and `notes.rewriteRef` settings.
 
-
-Author
-------
-Written by Johannes Schindelin <johannes.schindelin@gmx.de> and
-Johan Herland <johan@herland.net>
-
-Documentation
--------------
-Documentation by Johannes Schindelin and Johan Herland
-
 GIT
 ---
 Part of the linkgit:git[7] suite

Documentation/git-remote-ext.txt

@@ -116,11 +116,6 @@ begins with `ext::`.  Examples:
 	determined by the helper using environment variables (see
 	above).
 
-Documentation
---------------
-Documentation by Ilari Liusvaara, Jonathan Nieder and the Git list
-<git@vger.kernel.org>
-
 GIT
 ---
 Part of the linkgit:git[1] suite

Documentation/git-remote-fd.txt

@@ -50,10 +50,6 @@ EXAMPLES
 `git push fd::7,8/bar master`::
 	Same as above.
 
-Documentation
---------------
-Documentation by Ilari Liusvaara and the Git list <git@vger.kernel.org>
-
 GIT
 ---
 Part of the linkgit:git[1] suite