simplify is toc present

layouts/partials/IsTocPresent

-{{ return .context.Params.design.toc.present }}
\ No newline at end of file

layouts/partials/toc/container.html

-{{- $isTocPresent := partial "IsTocPresent" . -}}
+{{- $isTocPresent := .context.Params.design.toc.present -}}
 
 {{- if $isTocPresent -}}
   {{- partial "toc/cta" -}}