I posted this in another thread so figured I'd mention it here. I haven't tested this in 1.x, but 0.960 had a problem where if you changed a skill name (not the skill ID) then this caused a problem when importing/exporting a character since the file uses the skill names (not the ID). As a workaround I always create a skills.csv language file and do not make many changes in module_skills.py itself.
1) create an 'en' folder under the 'languages' folder in your mod
2) create a skills.csv and add text like the following. By putting a blank space for power draw in the example below it basically disables it so it doesn't appear in the list and I don't think you can give points into it. However, there are a few pixels where if you mouse over or click on it perfectly then you can see the description, so that is why I added that additional text.
skl_inventory_management|Cargo Management
skl_inventory_management_desc|Increases ship cargo capacity by +6 per skill level. (Leader skill)
skl_power_draw|
skl_power_draw_desc|Power Draw - this skill is not used