Remove :option:

Sphinx 1.5 warns about :option: usage without .. option:: description.
Since we do not use .. option:: to describe parameter, remove
:option: from the tools.

Change-Id: I995ad6772b8cc65b8ff255a1c2dad96bdff8adbc

os_doc_tools/commands.py

@@ -14,7 +14,6 @@
 
 import argparse
 import os
-import re
 import subprocess
 import sys
 import yaml
@@ -40,11 +39,6 @@ def quote_rst(line):
 
     line = line.replace('\\', '\\\\').replace('`', '\\`').replace('*', '\\*')
 
-    if '--' in line:
-        line = re.sub(r'(--[^ .\'\\]*)', r":option:`\1`", line)
-        # work around for "`--`" at murano
-        line = line.replace('\\`:option:`--`\\`', '```--```')
-
     if 'DEPRECATED!' in line:
         line = line.replace('DEPRECATED!', '**DEPRECATED!**')
     elif 'DEPRECATED' in line: