diff --git a/gen/data/dfa.yaml b/gen/data/dfa.yaml
deleted file mode 100644
index e93462d..0000000
--- a/gen/data/dfa.yaml
+++ /dev/null
@@ -1,77 +0,0 @@
-# Prefixes:
-# `_` means to lowercase accumulate.
-# `<` means to accumulate transition pattern as part of current state.
-# `+` means to accumulate transition pattern as part of next state.
-# `?` means to look ahead but don't accumulate transition pattern and allow next state to reconsume.
-
-Text:
-  '\w': ?TextWhitespace
-  '\<': +OpeningTagStart
-  '\</': +ClosingTag
-  '\<!--': +Comment
-  '&': ?TextEntity
-  '': Text
-
-TextWhitespace:
-  '\w': TextWhitespace
-  '&': ?TextEntity
-  '': ?Text
-
-Comment:
-  '-->': <Text
-  '': Comment
-
-ClosingTag:
-  '<tagName>': _ClosingTag
-  '>': <Text
-
-OpeningTagStart:
-  '\w': ?OpeningTagWhitespace
-  '<tagName>': _OpeningTagStart
-
-OpeningTagWhitespace:
-  '\w': OpeningTagWhitespace
-  '<attrName>': ?AttrName
-  '>': <Text
-
-AttrName:
-  '[>=\w]': ?AttrAfterName
-  '<attrName>': _AttrName
-
-AttrAfterName:
-  '\w': AttrAfterName
-  '>': ?OpeningTagWhitespace
-  '=': +AttrBeforeValue
-
-AttrBeforeValue:
-  '\w': AttrBeforeValue
-  "'": +AttrSingleQuotedValue
-  '"': +AttrDoubleQuotedValue
-  '': ?AttrUnquotedValue
-
-AttrSingleQuotedValue:
-  "'": <OpeningTagWhitespace
-  '&': ?AttrValueEntity
-  '\w': ?AttrSingleQuotedValueWhitespace
-  '': AttrSingleQuotedValue
-
-AttrSingleQuotedValueWhitespace:
-  '\w': AttrSingleQuotedValueWhitespace
-  '&': ?AttrValueEntity
-  '': ?AttrSingleQuotedValue
-
-AttrDoubleQuotedValue:
-  '"': <OpeningTagWhitespace
-  '&': ?AttrValueEntity
-  '\w': ?AttrDoubleQuotedValueWhitespace
-  '': AttrDoubleQuotedValue
-
-AttrDoubleQuotedValueWhitespace:
-  '\w': AttrDoubleQuotedValueWhitespace
-  '&': ?AttrValueEntity
-  '': ?AttrDoubleQuotedValue
-
-AttrUnquotedValue:
-  '\w': ?OpeningTagWhitespace
-  '&': ?AttrValueEntity
-  '': AttrUnquotedValue
diff --git a/gen/dfa.ts b/gen/dfa.ts
deleted file mode 100644
index bb817d3..0000000
--- a/gen/dfa.ts
+++ /dev/null
@@ -1,77 +0,0 @@
-import yaml from "yaml";
-import { DATA_DIR, RUST_OUT_DIR } from "./_common";
-import { readFileSync, writeFileSync } from "fs";
-import { join } from "path";
-import { EOL } from "os";
-import { parsePattern, TrieBuilder } from "./trie";
-
-const dfa: { [node: string]: { [transition: string]: string } } = yaml.parse(
-  readFileSync(join(DATA_DIR, "dfa.yaml"), "utf8")
-);
-// These states must always exist; see lex/mod.rs for more details.
-dfa["TextEntity"] = {};
-dfa["AttrValueEntity"] = {};
-dfa["Unknown"] = {};
-dfa["EOF"] = {};
-
-const nodes = Object.keys(dfa).sort();
-
-const rsTransition = (val: string) => {
-  const [_, flag, next] = /^([_<+?]?)(.*)$/.exec(val)!;
-  const consumeMode = {
-    _: "AccumulateLowerCase",
-    "": "Accumulate",
-    "<": "Current",
-    "+": "Next",
-    "?": "Reconsume",
-  }[flag];
-  return `Transition {
-    to: State::${next},
-    consume: ConsumeMode::${consumeMode},
-  }`;
-};
-
-const output = `
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-pub enum State {
-  ${nodes.map((n, i) => `${n} = ${i}`).join(`,${EOL}  `)}
-}
-
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-pub enum ConsumeMode {
-  Current,
-  Next,
-  Reconsume,
-  Accumulate,
-  AccumulateLowerCase,
-}
-
-#[derive(Clone, Copy)]
-pub struct Transition {
-  // Make pub to allow destructuring.
-  pub to: State,
-  pub consume: ConsumeMode,
-}
-
-${nodes
-  .map((n) => {
-    const trieBuilder = new TrieBuilder(n.toUpperCase(), "Transition");
-    for (const [pat, val] of Object.entries(dfa[n])) {
-      if (pat == "") {
-        continue;
-      }
-      trieBuilder.addPattern(parsePattern(pat), rsTransition(val));
-    }
-    if (dfa[n][""] !== undefined) {
-      trieBuilder.fillRemaining(rsTransition(dfa[n][""]));
-    }
-    return trieBuilder.generate();
-  })
-  .join(EOL + EOL)}
-
-pub static TRANSITIONS: [&'static crate::pattern::TrieNode<Transition>; ${
-  nodes.length
-}] = [${nodes.map((n) => n.toUpperCase()).join(", ")}];
-`;
-
-writeFileSync(join(RUST_OUT_DIR, "dfa.rs"), output);