Drop icudata from the dependency list from web.gyp

Drop icudata from the dependency list from web.gyp

Specifying icuuc is sufficient because icuuc depends on icudata.
Moreover, it causes ninja to complain about multiple rules specified for
icudata and a circular dependency when icu_use_data_file_flag is set to
1 on Linux.

See also https://codereview.chromium.org/89863002/

BUG=72633
TEST=All types of builds (static, shared, etc) go fine.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=163104

[jungshik at Google, 2013-12-02 17:58:34]

This is a companion to https://codereview.chromium.org/89863002/, but landing
this in blink first should not affect Chromium. That is, this CL can get go in
before the chromium's corresponding change goes in.

[Mark Mentovai, 2013-12-02 18:01:01]

LGTM. This was wrong before.

[jungshik at Google, 2013-12-03 17:43:07]

Thanks, Mark. 

Adam, can you approve the change (owner review)? thanks.

[abarth-chromium, 2013-12-03 17:57:57]

lgtm

[commit-bot: I haz the power, 2013-12-03 17:58:08]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jshin@chromium.org/93053003/1

[commit-bot: I haz the power, 2013-12-03 19:24:12]

Change committed as 163104