static/frontend: remove vuln experiment checks

The vuln experiment is live and the the experiment was removed
from the code, but the templates still checked for it.
So vuln banners were not displaying.

Change-Id: I924af945044490e7359c01a75e4c451f5209204b
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/405538
TryBot-Result: kokoro <noreply+kokoro@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
Reviewed-by: Julie Qiu <julieqiu@google.com>
diff --git a/static/frontend/search/search.tmpl b/static/frontend/search/search.tmpl
index a9b14fe..2de3da1 100644
--- a/static/frontend/search/search.tmpl
+++ b/static/frontend/search/search.tmpl
@@ -100,7 +100,6 @@
 {{define "search_package_results"}}
   <div>
     {{$query := .Query}}
-    {{$vulnsActive := (.Experiments.IsActive "vulns")}}
     {{range $i, $v := .Results}}
       {{$moreLink := eq $i (subtract $.Pagination.DefaultLimit 1)}}
       {{if eq $i $.Pagination.DefaultLimit}}<hr class="SearchResults-divider">{{end}}
@@ -114,12 +113,10 @@
             </a>
           </h2>
           {{with $v.ChipText}}<span class="go-Chip go-Chip--inverted">{{.}}</span>{{end}}
-          {{if $vulnsActive}}
-            {{range $v.Vulns}}
-              <span class="go-Chip go-Chip--alert">
-                {{.ID}}
-              </span>
-            {{end}}
+          {{range $v.Vulns}}
+            <span class="go-Chip go-Chip--alert">
+              {{.ID}}
+            </span>
           {{end}}
         </div>
         {{with $v.Synopsis}}
diff --git a/static/frontend/unit/_header.tmpl b/static/frontend/unit/_header.tmpl
index cda1d4d..fb89374 100644
--- a/static/frontend/unit/_header.tmpl
+++ b/static/frontend/unit/_header.tmpl
@@ -220,8 +220,7 @@
       />&nbsp; Redirected from <span data-test-id="redirected-banner-text">{{.}}</span>.
     </div>
   {{- end -}}
-  {{- if .Experiments.IsActive "vulns" -}}
-    {{range .Vulns}}{{template "vuln-message" .}}{{end}}{{end}}
+  {{range .Vulns}}{{template "vuln-message" .}}{{end}}
   {{- if .Unit.Deprecated -}}
     <div class="go-Message go-Message--warning">
       <img