Bug 1898003: 1 page collection export preview producing warning

 - remove if count of collection > 1 condition (one page collections exist)

Change-Id: I4d6866781a5864640230a8e776288edc3e7ffb18
Signed-off-by: Lisa Seeto <lisaseeto@catalyst.net.nz>
(cherry picked from commit f1f33d53)