Remove mail blockquote special case handling.

LayoutTests/editing/pasteboard/merge-end-blockquote.html

Index: LayoutTests/editing/pasteboard/merge-end-blockquote.html
diff --git a/LayoutTests/editing/pasteboard/merge-end-blockquote.html b/LayoutTests/editing/pasteboard/merge-end-blockquote.html
deleted file mode 100644
index 0d84b29c64ee1fd2f686237eba84ddb743037272..0000000000000000000000000000000000000000
--- a/LayoutTests/editing/pasteboard/merge-end-blockquote.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<script>
-if (window.testRunner)
-     testRunner.dumpEditingCallbacks();
-</script>
-<p>This tests pasting a Mail blockquote at the start of a paragraph.  Blockquoting should be stripped.</p>
-<div id="test1" contenteditable="true">x</div>
-
-<script type="text/javascript" src="../editing.js"></script>
-<script>
-var e = document.getElementById("test1");
-var s = window.getSelection();
-
-setSelectionCommand(e, 0, e, 0);
-insertHTMLCommand("<blockquote type='cite'><div>Blockquoted Text</div></blockquote>");
-</script>
-
-<p>This tests pasting text into a Mail blockquote.  The last bit of content in the incoming fragment should be merged with the paragraph after the position being pasted into.</p>
-<div id="test2" contenteditable="true"><blockquote type='cite'><div>Blockquoted Text</div></blockquote></div>
-
-<script>
-var e = document.getElementById("test2");
-var s = window.getSelection();
-
-setSelectionCommand(e, 0, e, 0);
-moveSelectionForwardByWordCommand();
-insertHTMLCommand("<div>foo</div><div>bar</div>");
-</script>