I've checked everything in my customer character, there is nothing there that suggests any use of anything from the 360 head tool 
https://www.reallusion.com/ContentStore/CTA/Pack/G3-360-Face-Tool/default.html

I probably opened it up once after buying it, but found it confusing at best, so I bagged it. What do I need to do REALLUSION so my customer characters are not requiring that package, as it states it's unavailable when you click on it. 

That's what is so confusing. I need to get that requirement removed, as it makes no sense. 

I don't have anything from CTA4 (I don't have the program), but when I go to your page I see under Base content required for full functionality: G3 360 Face Tool.

So you may have inadvertently used that tool.

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I created my first content pack here:
https://marketplace.reallusion.com/red-head-swimsuit-template-pack-4-to-6-year-old

If you scroll down you'll see a REQUIRED BASE CONTENT???



What is this??? why is it in my custom character and automatically required when someone purchases my character? how do I get rid of this?
https://marketplace.reallusion.com/oval-03_weyeshmouth