content: set Documentation-tocItem--funcsAndTypes to display:none
content: set Documentation-tocItem--funcsAndTypes to display:none

Fixes golang/go#40078

Change-Id: Ie6a563a225747d744ac092d62f7cff234b2ec13f
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/241157
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>

golang/pkgsite,golang/pkgsite,golang/pkgsite,golang/pkgsite