[LyX/master] Remove unneeded workaround

commit 21fbf4594311ac85e3f9ae7b0889263ce6e03cc4
Author: Juergen Spitzmueller <[email protected]>
Date:   Sun Mar 15 15:29:28 2026 +0100

    Remove unneeded workaround
    
    This doc uses FreeSerif
---
 lib/doc/ru/Math.lyx | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/lib/doc/ru/Math.lyx b/lib/doc/ru/Math.lyx
index 09de785fde..207d53e481 100644
--- a/lib/doc/ru/Math.lyx
+++ b/lib/doc/ru/Math.lyx
@@ -160,15 +160,6 @@
   \def\c#1{{\setbox0=\hbox{#1}\ifdim\ht0=1ex \accent184 #1%
     \else\ooalign{\unhbox0\crcr\hidewidth\char184\hidewidth}\fi}}
 \fi
-\ifxetex
-  % latinmodern (with XeTeX) does not feature \AA
-  \usepackage{newunicodechar}
-  \newcommand{\DeclareUnicodeCharacter}[2]{%
-    \begingroup\lccode`|=\string"#1\relax
-    \lowercase{\endgroup\newunicodechar{|}}{#2}%
-  }
-  \DeclareUnicodeCharacter{212B}{\AA}
-\fi
 \end_preamble
 \options bibliography=totoc,index=totoc,BCOR7.5mm,titlepage,captions=tableheading
 \use_default_options false
-- 
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