[LyX/master] Remove unused headers in output_xhtml.h

[Yuriy Skalko]

commit b5cb23a92a6ab8c5955b3806fbf5781cf6bbfc84
Author: Yuriy Skalko <yuriy.skalko at gmail.com>
Date:   Fri Oct 16 09:55:42 2020 +0300

    Remove unused headers in output_xhtml.h
---
 src/output_xhtml.h |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/src/output_xhtml.h b/src/output_xhtml.h
index 8a5b63a..e9ca271 100644
--- a/src/output_xhtml.h
+++ b/src/output_xhtml.h
@@ -17,9 +17,6 @@
 #include "support/strfwd.h"
 #include "xml.h"
 
-#include <deque>
-#include <memory>
-
 
 namespace lyx {