It would be nice to remove the 3 quests : 
- Craft a Rowboat : Get White Cedar Plywood
- Craft a Rowboat : Get Brass Ingot
- Craft a Rowboat : Lodging and Workers
from the suggested quests, as long as they are side quests to this questline [Social Action] Combat Training, and are not required.
I did the social action questline, and I skipped this part (because it's really boring), but now they stay in suggested quests and it's not possible to interact with them anymore.