[x/tour] content: remove line that doesn't add and is confusing
[x/tour] content: remove line that doesn't add and is confusing

Fixes golang/go#18926.

Change-Id: I03d5f7adcd2db0e862cffb5ff035d804b0d3b1db
Reviewed-on: https://go-review.googlesource.com/36220
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
X-Tour-Commit: c373014285671e75a2b50f45d204669442474b1b

golang/website,golang/website,golang/website,golang/website,golang/website,golang/website,golang/website