Yes, I just tried that, but without success at first.
After a long time of trying, I found the problem. It is the plugin Maintenance from Webfactory, which uses its own font definitions. I set a default font in the plugin and the problem was solved.
Only after replacing Google reCaptch with Honeypot all Google font entries disappeared.
I hope this satisfies German case law until the next ruling comes along. The protection of personal data is a serious issue in Europe.
Thank you for your tip.
Michael