[evolution] Remove unused EMailDisplayStyle enum.

[Matthew Barnes <mbarnes src gnome org>]

commit ab13a0e01a9ee7609ee2ef86cc5aeee3172c87cc
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sun Nov 10 12:37:13 2013 -0500

    Remove unused EMailDisplayStyle enum.

 libemail-engine/e-mail-engine-enums.h |    6 ------
 1 files changed, 0 insertions(+), 6 deletions(-)
---
diff --git a/libemail-engine/e-mail-engine-enums.h b/libemail-engine/e-mail-engine-enums.h
index 7232cfa..dc36f1b 100644
--- a/libemail-engine/e-mail-engine-enums.h
+++ b/libemail-engine/e-mail-engine-enums.h
@@ -24,12 +24,6 @@
 G_BEGIN_DECLS
 
 typedef enum {
-       E_MAIL_DISPLAY_STYLE_NORMAL,
-       E_MAIL_DISPLAY_STYLE_FULL_HEADERS,
-       E_MAIL_DISPLAY_STYLE_SOURCE
-} EMailDisplayStyle;
-
-typedef enum {
        E_MAIL_FORWARD_STYLE_ATTACHED,
        E_MAIL_FORWARD_STYLE_INLINE,
        E_MAIL_FORWARD_STYLE_QUOTED