Update *-page to not include styles if no math is found (speech version)

Author: dpvc

speech/mml2svg-page

@@ -97,8 +97,11 @@ require('mathjax-full/' + (argv.dist ? 'es5' : 'components/src/mml-svg') + '/mml
 MathJax.startup.promise.then(() => {
     const adaptor = MathJax.startup.adaptor;
     const html = MathJax.startup.document;
-    MathJax.startup.promise.then(() => {
-        console.log(adaptor.doctype(html.document));
-        console.log(adaptor.outerHTML(adaptor.root(html.document)));
-    });
+    if (html.math.toArray().length === 0) {
+      adaptor.remove(html.outputJax.svgStyles);
+      const cache = adaptor.elementById(adaptor.body(html.document), 'MJX-SVG-global-cache');
+      if (cache) adaptor.remove(cache);
+    }
+    console.log(adaptor.doctype(html.document));
+    console.log(adaptor.outerHTML(adaptor.root(html.document)));
 }).catch(err => console.log(err));