tools: remove old updateAuthors.awk script

Using the new tools/update-authors.sh script so this is
redundant

PR-URL: https://github.com/iojs/io.js/pull/582
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

tools/updateAuthors.awk

@@ -1,13 +0,0 @@
-# git log --pretty='format:%ae %an' | tac | awk -f tools/updateAuthors.awk
-{
-  if (!x[$1]++) {
-    #print $0
-    n = split($0, a, " ");
-    s = a[2];
-    for (i = 3; i <= n ; i++) {
-      s = s " " a[i];
-    }
-    print s " <" $1 ">";
-  }
-}
-