removed brace aliases;

--- a/doc-src/railsetup.sty	Fri Jun 02 20:38:28 2000 +0200
+++ b/doc-src/railsetup.sty	Sat Jun 03 23:57:04 2000 +0200
@@ -2,10 +2,6 @@
 \railalias{percent}{\%}
 \railalias{ppercent}{\%\%}
 \railalias{underscore}{\_}
-\railalias{lbrace}{\ttlbrace}
-\railalias{rbrace}{\ttrbrace}
-\railalias{llbrace}{\ttlbrace\ttlbrace}
-\railalias{rrbrace}{\ttrbrace\ttrbrace}
 
 \setlength\railextra{3.6ex}
 \setlength\railboxleft{0.9ex}