[meta] remove useless ESM

.github/workflows/node-aught.yml

@@ -9,10 +9,3 @@ jobs:
       range: '< 10'
       type: minors
       command: npm run tests-only
-
-  node:
-    name: 'node < 10'
-    needs: [tests]
-    runs-on: ubuntu-latest
-    steps:
-      - run: 'echo tests completed'

.github/workflows/node-tens.yml

@@ -9,10 +9,3 @@ jobs:
       range: '>= 10'
       type: minors
       command: npm run tests-only
-
-  node:
-    name: 'node >= 10'
-    needs: [tests]
-    runs-on: ubuntu-latest
-    steps:
-      - run: 'echo tests completed'

package.json

@@ -5,13 +5,7 @@
 	"main": "index.js",
 	"type": "commonjs",
 	"exports": {
-		".": [
-			{
-				"import": "./index.mjs",
-				"default": "./index.js"
-			},
-			"./index.js"
-		],
+		".": "./index.js",
 		"./auto": "./auto.js",
 		"./polyfill": "./polyfill.js",
 		"./implementation": "./implementation.js",
@@ -27,8 +21,7 @@
 		"postlint": "es-shim-api --bound",
 		"pretest": "npm run lint",
 		"tests-only": "nyc tape 'test/**/*.js'",
-		"tests-esm": "nyc node test/index.mjs",
-		"test": "npm run tests-only && npm run tests-esm",
+		"test": "npm run tests-only",
 		"posttest": "aud --production",
 		"version": "auto-changelog && git add CHANGELOG.md",
 		"postversion": "auto-changelog && git add CHANGELOG.md && git commit --no-edit --amend && git tag -f \"v$(node -e \"console.log(require('./package.json').version)\")\""