chore: remove leftover files from pre-monorepo era

packages/builders/.versionrc

@@ -1,3 +0,0 @@
-{
-	"releaseCommitMessageFormat": "chore(Release): publish"
-}

packages/builders/README.md

@@ -9,7 +9,6 @@
 		<a href="https://www.npmjs.com/package/@discordjs/builders"><img src="https://img.shields.io/npm/v/@discordjs/builders.svg?maxAge=3600" alt="npm version" /></a>
 		<a href="https://www.npmjs.com/package/@discordjs/builders"><img src="https://img.shields.io/npm/dt/@discordjs/builders.svg?maxAge=3600" alt="npm downloads" /></a>
 		<a href="https://github.com/discordjs/discord.js/actions"><img src="https://github.com/discordjs/discord.js/actions/workflows/test.yml/badge.svg" alt="Build status" /></a>
-		<a href="https://codecov.io/gh/discordjs/builders"><img src="https://codecov.io/gh/discordjs/builders/branch/main/graph/badge.svg" alt="Code coverage" /></a>
 	</p>
 </div>
 

packages/builders/codecov.yml

@@ -1,10 +0,0 @@
-coverage:
-  status:
-    project:
-      default:
-        target: 70%
-        threshold: 5%
-    patch:
-      default:
-        target: 70%
-        threshold: 5%