Revert "winetricks_list_installed(): use winetricks.log to determine what's been installed rather than parsing metadata/filesystem"
Revert "winetricks_list_installed(): use winetricks.log to determine what's been installed rather than parsing metadata/filesystem"

This reverts commit 43344b2f0cf577e0298e53910c3f876573ee16b9.

This was committed my mistake. A different approach will be merged soon.

Winetricks/winetricks,Winetricks/winetricks