[Client] Remove needless attribute

src/web/app/auth/tags/form.tag

@@ -29,7 +29,7 @@
 		<button onclick={ cancel }>キャンセル</button>
 		<button onclick={ accept }>アクセスを許可</button>
 	</div>
-	<style type="stylus">
+	<style>
 		:scope
 			display block
 

src/web/app/auth/tags/index.tag

@@ -24,7 +24,7 @@
 		<mk-signin></mk-signin>
 	</main>
 	<footer><img src="/_/resources/auth/logo.svg" alt="Misskey"/></footer>
-	<style type="stylus">
+	<style>
 		:scope
 			display block