Removed logic that was disabling other types of network connections during mobile activation.
Removed logic that was disabling other types of network connections during mobile activation.

BUG=chromium-os:16123
TEST=make sure modem activation, re-up can be performed while both connected and disconnected from wifi/ethernet connection
Review URL: http://codereview.chromium.org/7330009

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@111279 0039d316-1c4b-4281-b951-d872f2087c98

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