Remove data labels on releases charts.
Remove data labels on releases charts.

I find that it adds little value to how we view the charts.

hanmd82/ruby-bench-web,treble37/ruby-bench-web,klgilbert/ruby-bench-web,tgxworld/ruby-bench-web,hanmd82/ruby-bench-web,ruby-bench/ruby-bench-web,ruby-bench/ruby-bench-web,klgilbert/ruby-bench-web,treble37/ruby-bench-web,treble37/ruby-bench-web,klgilbert/ruby-bench-web,ruby-bench/ruby-bench-web,tgxworld/ruby-bench-web,bmarkons/ruby-bench-web,tgxworld/ruby-bench-web,bmarkons/ruby-bench-web,hanmd82/ruby-bench-web,bmarkons/ruby-bench-web