bug 1153288 - Drop omit_some from view_serializers
bug 1153288 - Drop omit_some from view_serializers

Explicitly override the fields and read_only_fields in view-specific
serializers, instead of using the omit_some hack.

mdn/browsercompat,jwhitlock/web-platform-compat,mdn/browsercompat,mdn/browsercompat,jwhitlock/web-platform-compat,jwhitlock/web-platform-compat