content: always display note about how documentation was rendered

Fixes github.com/golang/go/issues/37665

Change-Id: I8af55b80d08aec64e134d52d99d00eb624dbf1bd
Reviewed-on: https://team-review.git.corp.google.com/c/golang/discovery/+/683363
CI-Result: Cloud Build <[email protected]>
Reviewed-by: Jonathan Amsterdam <[email protected]>

Author: julieqiu

content/static/html/pages/pkg_doc.tmpl

@@ -9,9 +9,7 @@
     <div class="Documentation">
       {{.Documentation}}
       <div class="Documentation-build">
-        {{if not (eq .GOOS "linux")}}
-          <div>Documentation was rendered with GOOS={{.GOOS}} and GOARCH={{.GOARCH}}.</div>
-        {{end}}
+        <div>Documentation was rendered with GOOS={{.GOOS}} and GOARCH={{.GOARCH}}.</div>
       </div>
     </div>