[fs.req] Replace "encoded character type" with "character type"

Author: frederick-vs-ja

source/iostreams.tex

@@ -13251,24 +13251,19 @@
 
 \rSec2[fs.req]{Requirements}
 
-\pnum
-Throughout subclause~\ref{filesystems}, \tcode{char}, \keyword{wchar_t}, \keyword{char8_t},
-\keyword{char16_t}, and \keyword{char32_t} are collectively called
-\defnx{encoded character types}{encoded character type}.
-
 \pnum
 Functions with template parameters named \tcode{EcharT}
 shall not participate in overload resolution
-unless \tcode{EcharT} is one of the encoded character types.
+unless \tcode{EcharT} is a character type\iref{basic.fundamental}.
 
 \pnum
 Template parameters named \tcode{InputIterator} shall meet the
 \oldconcept{InputIterator} requirements\iref{input.iterators} and shall
-have a value type that is one of the encoded character types.
+have a value type that is a character type.
 
 \pnum
 \begin{note}
-Use of an encoded character type implies an associated
+Use of a character type implies an associated
 character set and encoding.
 Since \tcode{signed char} and \tcode{unsigned char} have no
 implied character set and encoding,