test suite: Drop no longer needed fedoradev /usr/bin/which workaround

Author: scop

test/docker/Dockerfile-fedoradev

@@ -1,14 +1,13 @@
 FROM fedora:rawhide
 
 # TODO: more coverage
-# /usr/bin/which: https://bugzilla.redhat.com/show_bug.cgi?id=1443357
 # --nogpgcheck: Ignore transient(?) package signature failures
 RUN dnf --nogpgcheck --refresh -y install \
         autoconf \
         automake \
         dejagnu \
         tcllib \
-        /usr/bin/xvfb-run /usr/bin/which \
+        /usr/bin/xvfb-run \
     && \
     dnf --nogpgcheck -y install \
         /usr/bin/checksec \