api/server/MAINTAINERS: back from vacation

Docker-DCO-1.1-Signed-off-by: Johan Euphrosine <proppy@google.com> (github: proppy)

api/server/MAINTAINERS

@@ -1,3 +1,2 @@
 Victor Vieux <vieux@docker.com> (@vieux)
-# off the grid until september
-# Johan Euphrosine <proppy@google.com> (@proppy)
+Johan Euphrosine <proppy@google.com> (@proppy)