feat: remove staging layer in container build

This PR removes the staging layer.

containers/jug/dev.Dockerfile

@@ -256,17 +256,6 @@ WORKDIR /
 ## ========================================================================================
 FROM builder as staging
 
-## Bugfix to address issues loading the Qt5 libraries on Linux kernels prior to 3.15
-## See
-#https://askubuntu.com/questions/1034313/ubuntu-18-4-libqt5core-so-5-cannot-open-shared-object-file-no-such-file-or-dir
-## and links therin for more info
-RUN <<EOF
-set -ex
-if [ -f /opt/local/lib/libQt5Core.so ] ; then
-  strip --remove-section=.note.ABI-tag /opt/local/lib/libQt5Core.so
-fi
-EOF
-
 RUN <<EOF
 set -ex
 spack debug report | sed "s/^/ - /" | sed "s/\* \*\*//" | sed "s/\*\*//" >> /etc/jug_info