Removed comment about needing GNU-sed

Rev: README:1.7

README

@@ -35,10 +35,6 @@ This creates the configure script and a Makefile.in. Now you can try
 file foo.h.x, try creating it with make foo.h.x or ./make_class <foo.h
 >foo.h.x, and similarly for missing foo.c.x files.
 
-It seems you also need GNU-sed; at least Solaris' sed doesn't
-understand the construction "sed -f -" construction to read a script
-on stdin.
-
 
 NEEDED LIBRARIES