8294748: Cleanup unneeded references to hg

Reviewed-by: erikj, clanger

make/autoconf/basic.m4

@@ -453,7 +453,7 @@ AC_DEFUN_ONCE([BASIC_CHECK_SRC_PERMS],
     # in the source tree when configure runs
     file_to_test="$TOPDIR/Makefile"
     if test `$STAT -c '%a' "$file_to_test"` -lt 400; then
-      AC_MSG_ERROR([Bad file permissions on src files. This is usually caused by cloning the repositories with a non cygwin hg in a directory not created in cygwin.])
+      AC_MSG_ERROR([Bad file permissions on src files. This is usually caused by cloning the repositories with non cygwin tools in a directory not created in cygwin.])
     fi
   fi
 ])

make/autoconf/basic_tools.m4

@@ -342,7 +342,6 @@ AC_DEFUN_ONCE([BASIC_SETUP_COMPLEX_TOOLS],
 
   UTIL_LOOKUP_PROGS(READELF, greadelf readelf)
   UTIL_LOOKUP_PROGS(DOT, dot)
-  UTIL_LOOKUP_PROGS(HG, hg)
   UTIL_LOOKUP_PROGS(STAT, stat)
   UTIL_LOOKUP_PROGS(TIME, time)
   UTIL_LOOKUP_PROGS(FLOCK, flock)

make/autoconf/spec.gmk.in

@@ -769,7 +769,6 @@ READELF:=@READELF@
 EXPR:=@EXPR@
 FILE:=@FILE@
 DOT:=@DOT@
-HG:=@HG@
 GIT:=@GIT@
 OBJCOPY:=@OBJCOPY@
 SETFILE:=@SETFILE@