[LyX/master] MathML: remove useless code

[Thibaut Cuvelier]

commit 5f7c26fbe52e2a55039996ad267e553dabbe9aa9
Author: Thibaut Cuvelier <tcuvelier at lyx.org>
Date:   Fri Jan 20 02:19:33 2023 +0100

    MathML: remove useless code
    
    Contributed by lynx: https://www.lyx.org/trac/ticket/12629
---
 src/mathed/InsetMathChar.cpp |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/src/mathed/InsetMathChar.cpp b/src/mathed/InsetMathChar.cpp
index a5001fc..483bbb8 100644
--- a/src/mathed/InsetMathChar.cpp
+++ b/src/mathed/InsetMathChar.cpp
@@ -258,8 +258,6 @@ void InsetMathChar::mathmlize(MathMLStream & ms) const
 	char const * type =
 		(isAlphaASCII(char_) || Encodings::isMathAlpha(char_))
 			? "mi" : "mo";
-	// we don't use MTag and ETag because we do not want the spacing before the end tag.
-	docstring tag = from_ascii(ms.namespacedTag(type));
 	ms << MTagInline(type)
 	   << char_type(char_)
 	   << ETagInline(type);