Update layer-cleanup.sh

Author: jgaucher-cs

.github/common/resources/layer-cleanup.sh

@@ -15,9 +15,9 @@
 
 apt-get autoclean --yes
 apt-get autoremove --yes
+pip cache purge
 
 rm -rf /var/lib/apt/lists/*
-rm -rf /etc/apt/sources.list.d/*
 rm -rf /usr/local/src/*
 
 rm -rf /var/cache/apt/*
@@ -29,4 +29,11 @@ rm -rf /usr/local/share/.cache/*
 rm -rf /tmp/* /var/tmp/*
 rm -rf /opt/conda/pkgs/cache
 
+rm -rf /tmp/whl
+
+# WARNING: this removes the apt repository list. To restore it and be able to run 'apt update', 
+# you must run (works only in Debian): 
+# . /etc/os-release && echo "deb http://deb.debian.org/debian $VERSION_CODENAME main" > /etc/apt/sources.list
+rm -rf /etc/apt/sources.list.d/*
+
 exit 0