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diff --git a/‎packages/next/check-error-codes.js‎
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diff --git a/‎packages/next/taskfile.js‎
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@@ -7,6 +7,3 @@ packages/next/compiled/** -text linguist-vendored
 
 # Make next/src/build folder indexable for github search
 build/** linguist-generated=false
-
-# Custom merge driver for auto-generated errors.json
-packages/next/errors.json merge=errors-json
@@ -75,8 +75,6 @@
     "swc-build-wasm": "tsx scripts/build-wasm.cjs",
     "build-turbopack-cli": "cargo build -p turbopack-cli --release",
     "sweep": "tsx scripts/sweep.cjs",
-    "check-error-codes": "node packages/next/check-error-codes.js",
-    "update-error-codes": "cd packages/next && pnpm taskr compile check_error_codes",
     "build-error-code-plugin": "crates/next-error-code-swc-plugin/build-and-move.sh",
     "storybook": "turbo run storybook",
     "build-storybook": "turbo run build-storybook",
 
@@ -6,7 +6,6 @@ const fs = require('fs/promises')
 // eslint-disable-next-line import/no-extraneous-dependencies
 const resolveFrom = require('resolve-from')
 const execa = require('execa')
-const process = require('process')
 const recast = require('recast')
 
 export async function next__polyfill_nomodule(task, opts) {
@@ -2785,10 +2784,7 @@ export async function diagnostics(task, opts) {
 }
 
 export async function build(task, opts) {
-  await task.serial(
-    ['precompile', 'compile', 'check_error_codes', 'generate_types'],
-    opts
-  )
+  await task.serial(['precompile', 'compile', 'generate_types'], opts)
 }
 
 export async function generate_types(task, opts) {
@@ -2809,25 +2805,6 @@ export async function generate_types(task, opts) {
   }
 }
 
-export async function check_error_codes(task, opts) {
-  try {
-    await execa.command('pnpm -w run check-error-codes', {
-      stdio: 'inherit',
-    })
-  } catch (err) {
-    if (process.env.CI) {
-      await execa.command(
-        'echo check_error_codes FAILED: There are new errors introduced but no corresponding error codes are found in errors.json file, so make sure you run `pnpm build` or `pnpm update-error-codes` and then commit the change in errors.json.',
-        {
-          stdio: 'inherit',
-        }
-      )
-      process.exit(1)
-    }
-    await task.start('compile', opts)
-  }
-}
-
 export default async function (task) {
   const opts = { dev: true }
   await task.clear('dist')