hello, I have 2 Hap AX Lite RouterBoard. Is it possible to remove the license on one of them and give it to my VPS with CHR?
Not possible.
Also, CHR is free to use (Trial 60 days with software upgrade, but unlimited if you keep on the same version)
Normis, so what happens after 60 days of e.g. trial PU? The help page at https://help.mikrotik.com/docs/display/ROS/Cloud+Hosted+Router%2C+CHR#CloudHostedRouter,CHR-Freelicenses isn’t 100% clear to me. Will the CHR install function as normal, just without being able to be updated? …or stop passing traffic? …or pass traffic but no configuration changes will be possible? …or? 
CHR will continue to work without any limitation, you will just have to update it manually if you choose to do so (export config, reinstall, import it)
1Mbit Upload limitation according to the wiki?!
Probably you should read the wiki again.
Free is not the same thing as Trial.