[LyX/master] Revert e500dc19c15334

[Juergen Spitzmueller]

commit ac58a5060e296001b7f42b8413a41ec305bfa3aa
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Fri Dec 2 11:21:15 2022 +0100

    Revert e500dc19c15334
    
    More general fix is upcoming.
---
 src/mathed/InsetMathHull.cpp |   15 +--------------
 1 files changed, 1 insertions(+), 14 deletions(-)

diff --git a/src/mathed/InsetMathHull.cpp b/src/mathed/InsetMathHull.cpp
index f5dce80..0ab06d2 100644
--- a/src/mathed/InsetMathHull.cpp
+++ b/src/mathed/InsetMathHull.cpp
@@ -709,20 +709,7 @@ static docstring latexString(InsetMathHull const & inset)
 	otexrowstream ots(ls);
 	TeXMathStream wi(ots, false, true, TeXMathStream::wsPreview, encoding);
 	inset.write(wi);
-	docstring const s = ls.str();
-	docstring res;
-	for (char_type c : s) {
-	    if (encoding->encodable(c))
-		    res += c;
-	    else {
-		    // indicate the encoding error by a boxed '?'
-		    res += "{\\fboxsep=1pt\\fbox{?}}";
-		    LYXERR0("Uncodable character" << " '"
-			    << c
-			    << "'");
-	    }
-	}
-	return res;
+	return ls.str();
 }