I assume you mean away "from" main storage (typo). Anyway. No, there isn't. There is a limit to the amount of T-dolls you can store (100). You should get rid of 2* via enhancement or disassembly for unwanted 3*.
If you really were hurting for space you can disassemble some dolls that you actually want but don't have time/data/reports to train them and recover them later (cost cores but meh).