Remove check for 'spec' from _create_scratch_build
Remove check for 'spec' from _create_scratch_build

After rendering the build_request, a check was made
to see if the rendered build_json has 'spec'.

This is redundant, as build_request objects already have
'spec' in them.

Signed-off-by: Hunor Csomortáni <da2a90d3a11043e49e4819d5f48217fbff25b5f0@redhat.com>

vrutkovs/osbs-client,bfontecc007/osbs-client,projectatomic/osbs-client,vrutkovs/osbs-client,DBuildService/osbs-client,projectatomic/osbs-client,DBuildService/osbs-client,bfontecc007/osbs-client