drop the double protect check now

unicodedomino.sty

@@ -91,31 +91,16 @@
 \else%
  % v1.2i 2019/07/09, or newer
  \long\def\UTFviii@two@octets@combine#1#2{%
-  \ifx\protect\@typeset@protect%
    \edef\unicodedomino@tmp{#1\unicodedomino@last{\string#2}}%
    \expandafter\unicodedomino@octets\unicodedomino@tmp\empty%
-  \else%
-   % protected, just write the original multibyte character
-   \string#1\string#2%
-  \fi%
  }%
  \long\def\UTFviii@three@octets@combine#1#2#3{%
-  \ifx\protect\@typeset@protect%
    \edef\unicodedomino@tmp{#1\unicodedomino@last{\string#2}\unicodedomino@last{\string#3}}%
    \expandafter\unicodedomino@octets\unicodedomino@tmp\empty%
-  \else%
-   % protected, just write the original multibyte character
-   \string#1\string#2\string#3%
-  \fi%
  }%
  \long\def\UTFviii@four@octets@combine#1#2#3#4{%
-  \ifx\protect\@typeset@protect%
    \edef\unicodedomino@tmp{#1\unicodedomino@last{\string#2}\unicodedomino@last{\string#3}\unicodedomino@last{\string#4}}%
    \expandafter\unicodedomino@octets\unicodedomino@tmp\empty%
-  \else%
-   % protected, just write the original multibyte character
-   \string#1\string#2\string#3\string#4%
-  \fi%
  }%
 \fi%