Dropping libdv i686

[Antonio T. sagitter]

Hi all.

libdv is currently failing in i686 architectures, it could be dropped.
Does anyone still need libdv-1686?

$ fedrq whatrequires libdv -F source
dvgrab
gstreamer1-plugins-good
xawtv

Recent scratch f41 build: 
https://koji.fedoraproject.org/koji/taskinfo?taskID=114030172

RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=2261310

Regards.