Remove webarchive tests.

LayoutTests/webarchive/doctype-expected.webarchive

Index: LayoutTests/webarchive/doctype-expected.webarchive
diff --git a/LayoutTests/webarchive/doctype-expected.webarchive b/LayoutTests/webarchive/doctype-expected.webarchive
deleted file mode 100644
index 3fc79673258ed8c241e3a818a062bb63c8541956..0000000000000000000000000000000000000000
--- a/LayoutTests/webarchive/doctype-expected.webarchive
+++ /dev/null
@@ -1,35 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>WebMainResource</key>
-	<dict>
-		<key>WebResourceData</key>
-		<string>&lt;!DOCTYPE HTML&gt;
-&lt;html&gt;
-&lt;head&gt;
-&lt;title&gt;Test for Bug 15290: REGRESSION (r14184-r14216): Duplicate DOCTYPE definitions when saving files as webarchives&lt;/title&gt;
-&lt;/head&gt;
-&lt;script&gt;
-    if (window.testRunner)
-        testRunner.dumpSourceAsWebArchive();
-&lt;/script&gt;
-&lt;body&gt;
-&lt;div&gt;
-&lt;a href="https://bugs.webkit.org/show_bug.cgi?id=15290"&gt;Bug 15290: REGRESSION (r14184-r14216): Duplicate DOCTYPE definitions when saving files as webarchives&lt;/a&gt;
-&lt;/div&gt;
-&lt;div&gt;
-This test checks that only one &amp;lt;!DOCTYPE&amp;gt; tag is written to a webarchive.
-&lt;/div&gt;
-&lt;/body&gt;
-&lt;/html&gt;
-</string>
-		<key>WebResourceFrameName</key>
-		<string></string>
-		<key>WebResourceMIMEType</key>
-		<string>text/html</string>
-		<key>WebResourceURL</key>
-		<string>file:///LayoutTests/webarchive/doctype.html</string>
-	</dict>
-</dict>
-</plist>