ci: Remove lcov workaround for Fedora

The bug being worked around here was fixed ages ago in F29 and F30.
There's no need to continue using the testing version of lcov so
go back to using the production version.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

opal-ci/Dockerfile-fedora32

 FROM fedora:32
 RUN dnf -y update
 RUN dnf -y install --allowerasing wget curl xterm gcc git xz make diffutils findutils expect valgrind valgrind-devel ccache dtc openssl-devel gcc-powerpc64-linux-gnu
-# for building documentation
-RUN dnf -y install python-pip
-# for GCOV coverage reports (need testing due to https://bugzilla.redhat.com/show_bug.cgi?id=1668843 )
-RUN dnf -y install lcov --enablerepo=updates-testing
+# for building documentation and the coverage report
+RUN dnf -y install python-pip lcov
 # below packages are for building dtc
 RUN dnf -y install flex bison
 RUN if [ `arch` = "x86_64" ]; then dnf -y install http://public.dhe.ibm.com/software/server/powerfuncsim/p9/packages/v1.1-0/systemsim-p9-1.1-0.f22.x86_64.rpm; fi