#71 Code cleanup - Weather

[Per Olav Flaten]

Weather functionality was originally implemented in the Time script. But as the Day & Night proccessing got completely replaced the weather was left out as it was unclear if it served any kind of gameplay purpose, as well as it didn't appear to be functioning properly.

The remnant script "Weather" is still existing. It should be removed, and any possible conflicts should be dealt with.

If we at some stage want to implement Weather we're most likely better off making a new rendition from scratch.