Remove hard-coded i686-w64-mingw32-widl
Landing the refactored Windows build descriptors (#10120 (closed)) breaks the Tor Browser build with a hard-coded i686-w64-mingw32-widl. We should therefore just get rid of the respective mozconfig line.
Landing the refactored Windows build descriptors (#10120 (closed)) breaks the Tor Browser build with a hard-coded i686-w64-mingw32-widl. We should therefore just get rid of the respective mozconfig line.