Revert of Add tools/mb to setup_links.py

Revert of Add tools/mb to setup_links.py (patchset #1 id:1 of https://codereview.webrtc.org/1692543002/ )

Reason for revert:
Doesn't solve the problem and MB is actually hardcoded to use gyp_chromium when running in GYP mode, so it's better to clean this up for now.

Original issue's description:
> Add tools/mb to setup_links.py
>
> I believe this is needed in order to setup the iOS simulator bots
> using the ios recipe module. We'll also most likely use MB in the future
> when moving over from GYP to GN (since that's the sole purpose of the tool:
> to make such a migration easier).
>
> BUG=chromium:498746
> NOTRY=True
> TBR=phoglund@webrtc.org
>
> Committed: https://crrev.com/68da769ab9579cac98fe4da7fb5da6dbb3842216
> Cr-Commit-Position: refs/heads/master@{#11575}

TBR=phoglund@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:498746
Committed: https://crrev.com/67ca0e16501d5c9179d3003a38a7cefc7cd3e259
Cr-Commit-Position: refs/heads/master@{#11577}

[kjellander_webrtc, 2016-02-11 14:36:21]

Created Revert of Add tools/mb to setup_links.py

[commit-bot: I haz the power, 2016-02-11 14:36:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1691723003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1691723003/1

[commit-bot: I haz the power, 2016-02-11 14:36:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-11 14:38:03]

Description was changed from

==========
Revert of Add tools/mb to setup_links.py (patchset #1 id:1 of
https://codereview.webrtc.org/1692543002/ )

Reason for revert:
Doesn't solve the problem and MB is actually hardcoded to use gyp_chromium when
running in GYP mode, so it's better to clean this up for now.

Original issue's description:
> Add tools/mb to setup_links.py
> 
> I believe this is needed in order to setup the iOS simulator bots
> using the ios recipe module. We'll also most likely use MB in the future
> when moving over from GYP to GN (since that's the sole purpose of the tool:
> to make such a migration easier).
> 
> BUG=chromium:498746
> NOTRY=True
> TBR=phoglund@webrtc.org
> 
> Committed: https://crrev.com/68da769ab9579cac98fe4da7fb5da6dbb3842216
> Cr-Commit-Position: refs/heads/master@{#11575}

TBR=phoglund@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:498746
==========

to

==========
Revert of Add tools/mb to setup_links.py (patchset #1 id:1 of
https://codereview.webrtc.org/1692543002/ )

Reason for revert:
Doesn't solve the problem and MB is actually hardcoded to use gyp_chromium when
running in GYP mode, so it's better to clean this up for now.

Original issue's description:
> Add tools/mb to setup_links.py
>
> I believe this is needed in order to setup the iOS simulator bots
> using the ios recipe module. We'll also most likely use MB in the future
> when moving over from GYP to GN (since that's the sole purpose of the tool:
> to make such a migration easier).
>
> BUG=chromium:498746
> NOTRY=True
> TBR=phoglund@webrtc.org
>
> Committed: https://crrev.com/68da769ab9579cac98fe4da7fb5da6dbb3842216
> Cr-Commit-Position: refs/heads/master@{#11575}

TBR=phoglund@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:498746

Committed: https://crrev.com/67ca0e16501d5c9179d3003a38a7cefc7cd3e259
Cr-Commit-Position: refs/heads/master@{#11577}
==========

[commit-bot: I haz the power, 2016-02-11 14:38:03]

Patchset 1 (id:??) landed as
https://crrev.com/67ca0e16501d5c9179d3003a38a7cefc7cd3e259
Cr-Commit-Position: refs/heads/master@{#11577}

[phoglund, 2016-02-11 14:59:03]

lgtm

[kjellander_webrtc, 2016-02-24 08:01:03]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.webrtc.org/1730113002/ by kjellander@webrtc.org.

The reason for reverting is: Actually, we're going to need this soon, so I'm
going to add it back again..