Remove pip cache purge from cleanup script

Removed pip cache purge command from cleanup function.

Author: MickLesk

misc/core.func

@@ -390,8 +390,6 @@ cleanup_lxc() {
       xargs -0 -n1 truncate -s 0 2>/dev/null || true
   fi
 
-  # Python pip
-  if command -v pip &>/dev/null; then $STD pip cache purge || true; fi
   # Node.js npm
   if command -v npm &>/dev/null; then $STD npm cache clean --force || true; fi
   # Node.js yarn