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.

Review URL: https://codereview.chromium.org/93053003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@163104 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs