remove _before_head.html files

packages/svelte/tests/hydration/samples/head-html-and-component/_before_head.html

@@ -1,6 +0,0 @@
-<!--ssr:0-->
-<!--ssr:1--><meta name="main_html" content="main_html"><!--ssr:1-->
-<meta name="main" content="main">
-<!--ssr:2--><!--ssr:3--><meta name="head_nested_html" content="head_nested_html"><!--ssr:3-->
-<meta name="head_nested" content="head_nested"><!--ssr:2--><!--ssr:4--><meta name="nested_html" content="nested_html"><!--ssr:4-->
-<meta name="nested" content="nested"><!--ssr:0-->

packages/svelte/tests/hydration/samples/head-meta-hydrate-duplicate/_before_head.html

@@ -1,4 +0,0 @@
-<title>Some Title</title><!--ssr:0-->
-<link rel="canonical" href="/">
-<meta name="description" content="some description">
-<meta name="keywords" content="some keywords"><!--ssr:0-->