cockpit-po-plugin: stop including base1/ in all packages
cockpit-po-plugin: stop including base1/ in all packages

Each package already includes base1/po.js, so including the base1/
translations in each webpack is redundant.

Fixes #13906

cockpit-project/cockpit,cockpit-project/cockpit,mvollmer/cockpit,mvollmer/cockpit,cockpit-project/cockpit,martinpitt/cockpit,mvollmer/cockpit,cockpit-project/cockpit,mvollmer/cockpit,mvollmer/cockpit,martinpitt/cockpit,cockpit-project/cockpit,martinpitt/cockpit,martinpitt/cockpit,martinpitt/cockpit