Remove deprecated global functions

[emschwartz]

No description provided.

[mellowagain]

this doesn't break anyone? maybe its fair to check direct dependents on crates.io and github to see if any of them still use it and maybe open a issue in the respective repos?

[emschwartz]

@mellowagain it might, but everything that's going in now will be part of the 0.6 release and some of the other changes will break things as well (like changing the names of metrics means you'll need to update the dashboards). Nevertheless, good suggestion about checking public dependents and submitting PRs for them

[emschwartz]

@mellowagain I just checked all of the crates that depend on this one. The ones that are still using the encode_global_metrics function are still on an earlier version, such as 0.3.3. I'm less worried about there being breaking changes if/when they decide to update if they're already a couple versions behind.