Revert "Change global prefix directory to /usr/local on OS X (#3458)" (#3713)

This reverts commit edfc370.

Author: bestander

src/cli/commands/global.js

@@ -4,7 +4,6 @@ import type {Reporter} from '../../reporters/index.js';
 import type {Manifest} from '../../types.js';
 import type Config from '../../config.js';
 import {MessageError} from '../../errors.js';
-import {OSX_GLOBAL_PREFIX_DIRECTORY} from '../../constants.js';
 import {registries} from '../../registries/index.js';
 import NoopReporter from '../../reporters/base-reporter.js';
 import buildSubCommands from './_build-sub-commands.js';
@@ -77,8 +76,6 @@ function getGlobalPrefix(config: Config, flags: Object): string {
     return String(config.getOption('prefix'));
   } else if (process.env.PREFIX) {
     return process.env.PREFIX;
-  } else if (process.platform === 'darwin') {
-    return OSX_GLOBAL_PREFIX_DIRECTORY;
   } else if (process.platform === 'win32') {
     if (process.env.LOCALAPPDATA) {
       return path.join(process.env.LOCALAPPDATA, 'Yarn', 'bin');

src/constants.js

@@ -58,7 +58,6 @@ export const MODULE_CACHE_DIRECTORY = getCacheDirectory();
 export const CONFIG_DIRECTORY = getDirectory('config');
 export const LINK_REGISTRY_DIRECTORY = path.join(CONFIG_DIRECTORY, 'link');
 export const GLOBAL_MODULE_DIRECTORY = path.join(CONFIG_DIRECTORY, 'global');
-export const OSX_GLOBAL_PREFIX_DIRECTORY = '/usr/local';
 
 export const META_FOLDER = '.yarn-meta';
 export const INTEGRITY_FILENAME = '.yarn-integrity';