content/static/html/pages: remove experiment executable-examples

Change-Id: I3e81ceab33e45f43db44ff65515f9aeb4e39a5a9
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/257199
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Julie Qiu <julie@golang.org>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
diff --git a/content/static/html/pages/pkg_doc.tmpl b/content/static/html/pages/pkg_doc.tmpl
index 856ca7b..c6e7198 100644
--- a/content/static/html/pages/pkg_doc.tmpl
+++ b/content/static/html/pages/pkg_doc.tmpl
@@ -53,11 +53,9 @@
   <script>
     loadScript("/static/js/jump.min.js");
   </script>
-  {{if (.Experiments.IsActive "executable-examples")}}
-    <script>
-      loadScript("/static/js/playground.min.js");
-    </script>
-  {{end}}
+  <script>
+    loadScript("/static/js/playground.min.js");
+  </script>
   {{if (.Experiments.IsActive "sidenav")}}
     <script>
       loadScript('/static/js/sidenav.js');
diff --git a/internal/middleware/secureheaders.go b/internal/middleware/secureheaders.go
index c8cfaa5..36e6634 100644
--- a/internal/middleware/secureheaders.go
+++ b/internal/middleware/secureheaders.go
@@ -26,8 +26,8 @@
 	"'sha256-y5EX2GR3tCwSK0/kmqZnsWVeBROA8tA75L+I+woljOE='",
 	// From content/static/html/pages/pkg_doc.tmpl
 	"'sha256-91GG/273d2LdEV//lJMbTodGN501OuKZKYYphui+wDQ='",
-	"'sha256-Y1vZzPZ448awUtFwK5f2nES8NyyeM5dgiQ/E3klx4GM='",
 	"'sha256-gBtJYPzfgw/0FIACORDIAD08i5rxTQ5J0rhIU656A2U='",
+	"'sha256-uQODpjQEw2CWPIl6zEmpUU1uULk5RYVCofnBw59UOOw='",
 	// From content/static/html/pages/unit.tmpl
 	"'sha256-RaqfI+f+zdCA5hhJCZgjT75qpniNKKXR7oXUJKsIt14='",
 	// From content/static/html/pages/unit_details.tmpl