Refactoring auto-bisect bot

tools/auto_bisect/bisect.cfg

Index: tools/auto_bisect/bisect.cfg
diff --git a/tools/auto_bisect/bisect.cfg b/tools/auto_bisect/bisect.cfg
index 7525bf80e8625992391cd7408c4cb78b65d62830..25323ff2c03be61ff1f80a341e7bef617cc97e0c 100644
--- a/tools/auto_bisect/bisect.cfg
+++ b/tools/auto_bisect/bisect.cfg
@@ -41,21 +41,6 @@ config = {
 For Windows, if you're calling a python script you will need to add "python"
 to the command, so the command would be changed to:
     'python tools/perf/run_benchmark -v --browser=release sunspider',
-
-For ChromeOS:
-  - For good and bad revision, the script may accept either ChromeOS versions
-    or unix timestamps.
-  - You don't need to specify --identity and --remote, they will be added to
-    the command using the bot's BISECT_CROS_IP and BISECT_CROS_BOARD values
-  - Example:
-
-config = {
-  'command': ('./tools/perf/run_benchmark -v --browser=cros-chrome-guest '
-              'smoothness.key_mobile_sites')
-  'good_revision': '4086.0.0',
-  'bad_revision': '4087.0.0',
-  'metric': 'mean_frame_time/mean_frame_time',
-}
 """
 
 config = {