Cleanup: Remove the instances of "rm_binaries.py" from 'src/tools/gn/bin'

Cleanup: Remove the instances of "rm_binaries.py" from 'src/tools/gn/bin'. The GN binaries have moved to src/buildtools. So, this script was removing GN binaries from tools/gn/bin that aren't used anymore. It was kept with the same intent till july 2014 (expected), and now think so, it is the good time to remove this script.

BUG=

Committed: https://crrev.com/5e4a92f923982405e20195e9de9f675c41e0748c
Cr-Commit-Position: refs/heads/master@{#296344}

[anujsharma, 2014-09-23 11:24:39]

anujk.sharma@samsung.com changed reviewers:
+ brettw@chromium.org, darin@chromium.org

[anujsharma, 2014-09-23 11:24:40]

brettw@chromium.org: Please review changes in tools/gn/bin module

darin@chromium.org: Please review changes in DEPS

[anujsharma, 2014-09-23 11:25:28]

On 2014/09/23 11:24:40, anujsharma wrote:
> mailto:brettw@chromium.org: Please review changes in tools/gn/bin module
> 
> mailto:darin@chromium.org: Please review changes in DEPS

PTAL

[brettw, 2014-09-23 20:15:08]

thanks. LGTM

[anujsharma, 2014-09-24 03:12:57]

The CQ bit was checked by anujk.sharma@samsung.com

[commit-bot: I haz the power, 2014-09-24 03:13:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/598493002/1

[anujsharma, 2014-09-24 03:29:50]

On 2014/09/24 03:13:29, I haz the power (commit-bot) wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/598493002/1

Thanks brettw for LGTM.

[commit-bot: I haz the power, 2014-09-24 04:10:03]

Committed patchset #1 (id:1) as 4866594df63c9e8c664f02343aeb07af87ce79d3

[commit-bot: I haz the power, 2014-09-24 04:10:40]

Patchset 1 (id:??) landed as
https://crrev.com/5e4a92f923982405e20195e9de9f675c41e0748c
Cr-Commit-Position: refs/heads/master@{#296344}