Remove unused WebViewCore::isPaused() and setIsPaused()

The last caller of these methods was removed in
I7be5b4224555bc8c3893b75275ac3a997a6677d1.

See WebKit change Ie645cb657407c34a63e5df6b0ade050f1780a7f0.

Change-Id: I9e5c0fd914f53d11e130ffcdc0e749f45dfe4013
1 file changed