Remove passing config file in ord service file

[terror]

Fixes #1665

[casey]

We need this config on ordinals.com, so we can't remove it.

Should we can make ord take a --config-dir option?

If this flag is passed, ord will look in that dir for ord.yaml, and if it doesn't find it, just not load any config. Then, we can put ord.yaml in a dir that already exist, like /var/lib/ord, and for users without it ord will not complain.

[terror]

We need this config on ordinals.com, so we can't remove it.

Should we can make ord take a --config-dir option?

If this flag is passed, ord will look in that dir for ord.yaml, and if it doesn't find it, just not load any config. Then, we can put ord.yaml in a dir that already exist, like /var/lib/ord, and for users without it ord will not complain.

Yah that sounds good to me.