From 5f00f5717cf0c7bbcd1299d2b24656f58f5ce0af Mon Sep 17 00:00:00 2001
From: isaacs <i@izs.me>
Date: Jun 19 2013 23:59:46 +0000
Subject: bnf: Remove unused 'letters', 'non-digits'


via: @EddieGarmon

---

diff --git a/semver.md b/semver.md
index f3bc14e..4cb94ce 100644
--- a/semver.md
+++ b/semver.md
@@ -174,9 +174,6 @@ Backus–Naur Form Grammar for Valid SemVer Versions
     <identifier character> ::= <digit>
                              | <non-digit>
 
-    <non-digits> ::= <non-digit>
-                   | <non-digit> <non-digits>
-
     <non-digit> ::= <letter>
                   | "-"
 
@@ -188,9 +185,6 @@ Backus–Naur Form Grammar for Valid SemVer Versions
 
     <positive digit> ::= "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
 
-    <letters> ::= <letter>
-                | <letter> <letters>
-
     <letter> ::= "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J"
                | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | "S" | "T"
                | "U" | "V" | "W" | "X" | "Y" | "Z" | "a" | "b" | "c" | "d"