Remove unnecessary glibc-devel and its dependencies

scripts/install_external.sh

@@ -140,15 +140,20 @@ function performPreInstallationTasksForExternalBuild()
 function installPackages()
 {
     if [ "$PLATFORM_NAME" == "$RHEL8" ]; then
-        ACCEPT_EULA=Y dnf -q -y --disableplugin=subscription-manager install \
-            $(getListOfPackagesToInstall)
-
-    elif [ "$PLATFORM_NAME" == "$RHEL7" ]; then
-        ACCEPT_EULA=Y yum -y --nogpgcheck install \
+        ACCEPT_EULA=Y dnf -q -y -v --disableplugin=subscription-manager install \
             $(getListOfPackagesToInstall)
     fi
 }
 
+# Function that removes packages from the container image
+# which are not actually needed.
+# 
+function removeUnnecessaryPackages()
+{
+    dnf remove -y -v \
+        glibc-devel
+}
+
 # Function that performs post-installation tasks
 # common across build environments.
 #
@@ -181,6 +186,8 @@ function performCommonPostInstallationTasks
     # Remove files from /tmp.
     #
     rm -rf /tmp/*
+
+    removeUnnecessaryPackages
 }
 
 # Function that drives the installation of packages