Replace RE2 import with a dependency

third_party/re2/doc/mksyntaxwiki

Index: third_party/re2/doc/mksyntaxwiki
diff --git a/third_party/re2/doc/mksyntaxwiki b/third_party/re2/doc/mksyntaxwiki
deleted file mode 100755
index 930b3896e21134899ddb5b93df3b66aa5daaa635..0000000000000000000000000000000000000000
--- a/third_party/re2/doc/mksyntaxwiki
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/bin/sh
-
-cp syntax.txt syntax.wiki
-sam -d syntax.wiki <<'!'
-,s!`!`````!g
-,s!== (([^()]|\([^()]*\))*)!≡ `\1`!g
-,s!«!`!g
-,s!»!`!g
-,s! vim$! <font size="1">VIM</font>!g
-,s! pcre$! <font size="1">PCRE</font>!g
-,s! perl$! <font size="1">PERL</font>!g
-,s!(^[^	]+)	(.*)\n!`\1`	\2\n!g
-,x g/NOT SUPPORTED/ s!^[^	]+!<font color="#808080">&</font>!
-,s!NOT SUPPORTED!<font size="1">(&)</font>!g
-,s!(^[^	]+)	(.*)\n!<tr><td>\1</td><td>\2</td></tr>\n!g
-,s!.*:$!<b>&</b>!g
-,s!^$!<tr><td></td></tr>!g
-,x v/<tr>/ s!.*!<tr><td colspan="2">&</td></tr>!
-1,2c
-#summary I define UNIX as “30 definitions of regular expressions living under one roof.” —Don Knuth
-
-<wiki:comment>
-GENERATED BY mksyntaxwiki.  DO NOT EDIT
-</wiki:comment>
-
-<table border="0" cellpadding="2" cellspacing="2">
-<tr><td colspan="2">This page lists the regular expression syntax accepted by RE2.</td></tr>
-<tr><td colspan="2">It also lists syntax accepted by PCRE, PERL, and VIM.</td></tr>
-<tr><td colspan="2">Grayed out expressions are not supported by RE2.</td></tr>
-.
-$a
-</table>
-.
-w
-q
-!