Revert "Add chart URL tool"

This was mistakenly applied twice.

This reverts commit ff0665c3d477993bf94e0d197e73e91c7d3fc103.

Fix handling of absolute staticDir paths

Add chart URL tool

Implements: https://todo.sr.ht/~sircmpwn/chartsrv/3

Add chart URL tool

Implements: https://todo.sr.ht/~sircmpwn/chartsrv/3

Fix label when metric starts with name

Eliminate NaN or infinite data points

Fix Printf without formatting directives

Document the label option

Remove undocumented legend option

Add label support

Minor formatting improvement

Add /chart.png path

Add until option

Error out instead of crashing when server isn't specified

Add date to labels for ranges >24 hours

go.mod: update module name

Implement &min=...

Expand README.md

Document port specification usage

Add example chart