modding: useless abilities

[Phoenix-D]

Also try: warp point: unstable (or any of the other listings in the stellar abilities).

These are good. Ground defense might do something, but I doubt it.
star - unstable
palace
planet - change ground defense
planet - shield generation

This one might confuse the AI a bit..
drop troops

All the below are clean, I think.

resource gen modifier planet - minerals
resource gen modifier planet - radioactives
resource gen modifier planet - organics
planet point generation modifier - research
planet point generation modifier - intelligence
resource conVersion
system - destructive center
ancient ruins
ancient ruins unique