rtmp-services: Remove unresponsive servers
These servers are unresponsive and are causing our nightly service
checks to fail. We do not know if these servers are intentionally
unreachable, but I do not want our nightly CI runs to keep failing, so I
am removing them unless we are informed they are working.
(cherry picked from commit 6f115df3afa6baa1cd12c5e7809a96ef6c4445e3)