Remove codes related deleting Blink or WebKit repository while processing revisions.

Remove codes related deleting Blink or WebKit repository while processing revisions.

If the script is switching between Blink and WebKit during bisect, over a year it's been only blink
for chromium and we don't need these codes.

BUG=
NOTRY=true

Committed: https://crrev.com/bd60d8841b6e612e9535aae035e9b457131ca90f
Cr-Commit-Position: refs/heads/master@{#292476}

[prasadv, 2014-08-28 21:37:32]

prasadv@chromium.org changed reviewers:
+ qyearsley@chromium.org

[tonyg, 2014-08-28 21:42:30]

tonyg@chromium.org changed reviewers:
+ tonyg@chromium.org

[tonyg, 2014-08-28 21:42:30]

lgtm

[prasadv, 2014-08-28 21:48:40]

The CQ bit was checked by prasadv@chromium.org

[commit-bot: I haz the power, 2014-08-28 21:49:19]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/prasadv@chromium.org/513253003/20001

[commit-bot: I haz the power, 2014-08-28 21:56:39]

Committed patchset #2 (id:20001) as 7bea26d6cab273add963a3348fd02e9bceb97b0f

[qyearsley, 2014-08-28 23:11:58]

On 2014/08/28 21:56:39, I haz the power (commit-bot) wrote:
> Committed patchset #2 (id:20001) as 7bea26d6cab273add963a3348fd02e9bceb97b0f

Good cleanup :-)

[commit-bot: I haz the power, 2014-09-10 03:02:42]

Patchset 2 (id:??) landed as
https://crrev.com/bd60d8841b6e612e9535aae035e9b457131ca90f
Cr-Commit-Position: refs/heads/master@{#292476}