Revert "--help option and help command should print to stdout not stderr"

This reverts commit 61b129d818.

Signed-off-by: Victor Vieux <vieux@docker.com>

docs/man/docker-commit.1.md

@@ -7,7 +7,6 @@ docker-commit - Create a new image from a container's changes
 # SYNOPSIS
 **docker commit**
 [**-a**|**--author**[=*AUTHOR*]]
-[**--help**]
 [**-m**|**--message**[=*MESSAGE*]]
 [**-p**|**--pause**[=*true*]]
  CONTAINER [REPOSITORY[:TAG]]
@@ -19,9 +18,6 @@ Using an existing container's name or ID you can create a new image.
 **-a**, **--author**=""
    Author (e.g., "John Hannibal Smith <hannibal@a-team.com>")
 
-**--help**
-  Print usage statement
-
 **-m**, **--message**=""
    Commit message