leaflet: Remove visible child workaround

Looks like it's not needed after Librem5/libhandy!339

Signed-off-by: Alexander Mikhaylenko <alexm@gnome.org>
7 jobs for wip/exalm/workaround in 9 minutes (queued for 1 second)
Status Name Job ID Coverage
  Build
passed build-debian-clang #236938
librem5

00:03:35

passed build-debian-gcc #236936
librem5

00:02:52

passed build-debian-gcc-static #236937
librem5

00:02:45

passed build-fedora-gcc #236939
librem5

00:02:59

 
  Docs
passed build-gtkdoc #236940
librem5

00:01:32

 
  Test
passed unit-test #236941
librem5

00:01:29

44.2%
 
  Package
passed package-debian #236942
librem5

00:02:00