Remove mail blockquote special case handling.

LayoutTests/platform/chromium-win/editing/execCommand/4580583-2-expected.txt

Index: LayoutTests/platform/chromium-win/editing/execCommand/4580583-2-expected.txt
diff --git a/LayoutTests/platform/chromium-win/editing/execCommand/4580583-2-expected.txt b/LayoutTests/platform/chromium-win/editing/execCommand/4580583-2-expected.txt
deleted file mode 100644
index 08a28616a2d2f8c94323ce6cec7e0acd1519a16e..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/chromium-win/editing/execCommand/4580583-2-expected.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-layer at (0,0) size 800x600
-  RenderView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  RenderBlock {HTML} at (0,0) size 800x600
-    RenderBody {BODY} at (8,8) size 784x576
-      RenderBlock {P} at (0,0) size 784x40
-        RenderText {#text} at (0,0) size 754x39
-          text run at (0,0) width 455: "This tests to make sure that breaking a quoted list doesn't renumber the list. "
-          text run at (455,0) width 299: "You should see a list broken in two below, the list"
-          text run at (0,20) width 616: "items numbered 1, 2, 2, 3, 4. Two list items will be numbered '2' because the original item '2' was split."
-      RenderBlock {DIV} at (0,56) size 784x152
-        RenderBlock {BLOCKQUOTE} at (2,0) size 742x40 [color=#0000FF] [border: none (2px solid #0000FF)]
-          RenderBlock {OL} at (2,0) size 740x40
-            RenderListItem {LI} at (40,0) size 700x20
-              RenderListMarker at (-21,0) size 16x19: "1"
-              RenderText {#text} at (0,0) size 26x19
-                text run at (0,0) width 26: "One"
-            RenderListItem {LI} at (40,20) size 700x20
-              RenderListMarker at (-21,0) size 16x19: "2"
-              RenderText {#text} at (0,0) size 28x19
-                text run at (0,0) width 28: "Two"
-        RenderBlock (anonymous) at (0,56) size 784x20
-          RenderBR {BR} at (0,0) size 0x19
-        RenderBlock {BLOCKQUOTE} at (2,92) size 742x60 [color=#0000FF] [border: none (2px solid #0000FF)]
-          RenderBlock {OL} at (2,0) size 740x60
-            RenderListItem {LI} at (40,0) size 700x20
-              RenderListMarker at (-21,0) size 16x19: "2"
-              RenderText {#text} at (0,0) size 28x19
-                text run at (0,0) width 28: "Two"
-            RenderListItem {LI} at (40,20) size 700x20
-              RenderListMarker at (-21,0) size 16x19: "3"
-              RenderText {#text} at (0,0) size 35x19
-                text run at (0,0) width 35: "Three"
-            RenderListItem {LI} at (40,40) size 700x20
-              RenderListMarker at (-21,0) size 16x19: "4"
-              RenderText {#text} at (0,0) size 29x19
-                text run at (0,0) width 29: "Four"
-caret: position 0 of child 2 {BR} of child 3 {DIV} of body