Remove myself as sole maintainer of api reference docs.

Please still ping me before changing APIs :)

Docker-DCO-1.1-Signed-off-by: Solomon Hykes <solomon@docker.com> (github: shykes)

docs/sources/reference/api/MAINTAINERS

@@ -1 +0,0 @@
-Solomon Hykes <solomon@dotcloud.com> (@shykes)