Removed check for 8-bit clean m4.

Rev: configure.in:1.131

configure.in

@@ -246,23 +246,6 @@ AC_PATH_PROG(BASH, bash,, $PATH)
 AC_PATH_PROG(GROFF, groff,, $PATH)
 AC_PATH_PROG(M4, m4, m4)
 
-AC_CACHE_CHECK([if m4 can handle eight-bit quote characters],
-  lsh_cv_prog_m4_quote_8bit,
-  [ if test xfoo = x`echo 'change''quote(,)foo' | $M4`; then
-      lsh_cv_prog_m4_quote_8bit=yes
-    else   
-      lsh_cv_prog_m4_quote_8bit=no
-    fi])
-
-if test x$lsh_cv_prog_m4_quote_8bit = xno; then
-  AC_MSG_WARN(  
-[To get the testsuite to work properly, you may need to
-upgrade to a better version than GNU m4 1.4, or recompile
-it with CFLAGS=-funsigned-char.
-Latest version is available at <URL: http://www.seindal.dk/rene/gnu/>])
-  M4="false --"
-fi
-
 # Checks for header files.
 AC_HEADER_STDC