Remove unnecessary C++ library package install from GH prep script

These packages needed to be installed in some of the Linux
distributions because the swift docker container images didn't
include them, even though they are required to compile any C++
code. The docker images should be updated now and so these extra
steps are no longer needed.

Author: cmcgee1024

scripts/prep-gh-action.sh

@@ -1,9 +1,12 @@
 #!/bin/bash
 
+# This script does a bit of extra preparation of the docker containers used to run the GitHub workflows
+# that are specific to this project's needs when building/testing. Note that this script runs on
+# every supported Linux distribution so it must adapt to the distribution that it is running.
+
 apt-get --help && apt-get update && apt-get -y install curl make
 yum --help && (curl --help && yum -y install curl) && yum install make
 
-(cat /etc/os-release | grep bookworm) && apt-get -y install libstdc++-12-dev gnupg2
-(cat /etc/os-release | grep 'Fedora Linux 39') && yum -y install libstdc++-devel libstdc++-static
+(cat /etc/os-release | grep bookworm) && apt-get -y install gnupg2
 
 exit 0