opcode 015F: text fix

fixed description from:
015F: set_camera_position 46.5625 -733.875 23.9375 0.0 rotation 0.0 0.0
to
015F: set_camera_position 46.5625 -733.875 23.9375 rotation 0.0 0.0 0.0
No effect on compilation itself, but it makes more sense when reading.

Deleted the obsolete GTA 3 main vanilla.txt