Remove preload on gr-app.js

Also refer to https://gerrit-review.googlesource.com/c/gerrit/+/230464 for more.

Bug: Issue 12067
Change-Id: I0f3b10fdc1fa7dd31699a16337d5edb5bcaee0e9
diff --git a/resources/com/google/gerrit/httpd/raw/PolyGerritIndexHtml.soy b/resources/com/google/gerrit/httpd/raw/PolyGerritIndexHtml.soy
index 38270bf..8f151a8 100644
--- a/resources/com/google/gerrit/httpd/raw/PolyGerritIndexHtml.soy
+++ b/resources/com/google/gerrit/httpd/raw/PolyGerritIndexHtml.soy
@@ -71,7 +71,6 @@
     <link rel="import" href="{$assetsPath}/{$assetsBundle}">{\n}
   {/if}
 
-  <link rel="preload" href="{$staticResourcePath}/elements/gr-app.js" as="script" crossorigin="anonymous">{\n}
   <link rel="import" href="{$staticResourcePath}/elements/gr-app.html">{\n}
 
   <body unresolved>{\n}