Remove ShadyDom/ShadyCSS

This is not needed, gerrit has been working under polymer 2 for a while.

Change-Id: Ib4be1f3e82ffbaba3d922c788a96ca96a12126b4
diff --git a/java/com/google/gerrit/httpd/raw/IndexHtmlUtil.java b/java/com/google/gerrit/httpd/raw/IndexHtmlUtil.java
index 43470af..b6375c8 100644
--- a/java/com/google/gerrit/httpd/raw/IndexHtmlUtil.java
+++ b/java/com/google/gerrit/httpd/raw/IndexHtmlUtil.java
@@ -186,12 +186,6 @@
     if (urlParameterMap.containsKey("ce")) {
       data.put("polyfillCE", "true");
     }
-    if (urlParameterMap.containsKey("sd")) {
-      data.put("polyfillSD", "true");
-    }
-    if (urlParameterMap.containsKey("sc")) {
-      data.put("polyfillSC", "true");
-    }
     if (urlParameterMap.containsKey("gf")) {
       data.put("useGoogleFonts", "true");
     }
diff --git a/resources/com/google/gerrit/httpd/raw/PolyGerritIndexHtml.soy b/resources/com/google/gerrit/httpd/raw/PolyGerritIndexHtml.soy
index dbb47a3..212f504 100644
--- a/resources/com/google/gerrit/httpd/raw/PolyGerritIndexHtml.soy
+++ b/resources/com/google/gerrit/httpd/raw/PolyGerritIndexHtml.soy
@@ -25,8 +25,6 @@
   {@param? faviconPath: ?}
   {@param? versionInfo: ?}
   {@param? polyfillCE: ?}
-  {@param? polyfillSD: ?}
-  {@param? polyfillSC: ?}
   {@param? useGoogleFonts: ?}
   {@param? changeRequestsPath: ?}
   {@param? defaultChangeDetailHex: ?}
@@ -62,8 +60,6 @@
     {if $staticResourcePath != ''}window.STATIC_RESOURCE_PATH = '{$staticResourcePath}';{/if}
     {if $assetsPath}window.ASSETS_PATH = '{$assetsPath}';{/if}
     {if $polyfillCE}if (window.customElements) window.customElements.forcePolyfill = true;{/if}
-    {if $polyfillSD}{literal}ShadyDOM = { force: true };{/literal}{/if}
-    {if $polyfillSC}{literal}ShadyCSS = { shimcssproperties: true};{/literal}{/if}
     {if $gerritInitialData}
       // INITIAL_DATA is a string that represents a JSON map. It's inlined here so that we can
       // spare calls to the API when starting up the app.