Remove fixed Chrome bug from known issues

Author: emlun

README

@@ -59,20 +59,6 @@ and other higher level concepts can make use of this authentication mechanism,
 but the authentication mechanism alone does not make a security system.
 
 
-== Known issues
-
-- In the link:webauthn-server-demo[example app], authentication does not work in
-  Chrome as of version 70. This is due to a
-  link:https://bugs.chromium.org/p/chromium/issues/detail?id=847878[bug in
-  Chrome] which will not be worked around here. To work around this in
-  application code, you can omit the
-  link:https://developers.yubico.com/java-webauthn-server/JavaDoc/webauthn-server-core/latest/com/yubico/webauthn/data/AuthenticatorAssertionResponse.AuthenticatorAssertionResponseBuilder.html#userHandle-java.util.Optional[`userHandle`]
-  when constructing an
-  link:https://developers.yubico.com/java-webauthn-server/JavaDoc/webauthn-server-core/latest/com/yubico/webauthn/data/AuthenticatorAssertionResponse.html[`AuthenticatorAssertionResponse`]
-  value if the `userHandle` is empty. See
-  https://github.com/Yubico/java-webauthn-server/issues/12 .
-
-
 == Documentation
 
 See the