[go][node][python][ruby] Remove @now/build-utils backwards compat hack (#6603)

`@now/build-utils` has not been published in a long time, so let's remove this logic.

packages/python/build.js

@@ -16,8 +16,6 @@ async function main() {
       join(__dirname, 'src/index.ts'),
       '-e',
       '@vercel/build-utils',
-      '-e',
-      '@now/build-utils',
       '-o',
       outDir,
     ],

packages/python/src/build-utils.ts

@@ -1,10 +0,0 @@
-let buildUtils: typeof import('@vercel/build-utils');
-
-try {
-  buildUtils = require('@vercel/build-utils');
-} catch (e) {
-  // Fallback for older CLI versions
-  buildUtils = require('@now/build-utils');
-}
-
-export default buildUtils;

packages/python/src/index.ts

@@ -4,16 +4,16 @@ import fs from 'fs';
 import { promisify } from 'util';
 const readFile = promisify(fs.readFile);
 const writeFile = promisify(fs.writeFile);
-import buildUtils from './build-utils';
-import { GlobOptions, BuildOptions } from '@vercel/build-utils';
-const {
+import {
+  GlobOptions,
+  BuildOptions,
   getWriteableDirectory,
   download,
   glob,
   createLambda,
   shouldServe,
   debug,
-} = buildUtils;
+} from '@vercel/build-utils';
 import { installRequirement, installRequirementsFile } from './install';
 
 async function pipenvConvert(cmd: string, srcDir: string) {

packages/python/src/install.ts

@@ -1,7 +1,5 @@
 import execa from 'execa';
-import { Meta } from '@vercel/build-utils';
-import buildUtils from './build-utils';
-const { debug } = buildUtils;
+import { Meta, debug } from '@vercel/build-utils';
 const pipPath = 'pip3';
 
 const makeDependencyCheckCode = (dependency: string) => `