Revert "Add message that we only support TS >= 4.1.0 (#3319)"

This reverts commit 7c6bf48.

Author: saihaj

package.json

@@ -6,20 +6,7 @@
   "private": true,
   "main": "index",
   "module": "index.mjs",
-  "types": "NotSupportedTSVersion.d.ts",
-  "typesVersions": {
-    ">=4.1.0": {
-      "*": [
-        "index.d.ts"
-      ],
-      "*/*": [
-        "*/index.d.ts"
-      ],
-      "*/*/*": [
-        "*/*"
-      ]
-    }
-  },
+  "types": "index.d.ts",
   "sideEffects": false,
   "homepage": "https://github.com/graphql/graphql-js",
   "bugs": {

resources/build-npm.js

@@ -18,8 +18,6 @@ if (require.main === module) {
   fs.rmSync('./npmDist', { recursive: true, force: true });
   fs.mkdirSync('./npmDist');
 
-  const packageJSON = buildPackageJSON();
-
   const srcFiles = readdirRecursive('./src', { ignoreDir: /^__.*__$/ });
   for (const filepath of srcFiles) {
     const srcPath = path.join('./src', filepath);
@@ -50,23 +48,11 @@ if (require.main === module) {
     'Fail to generate `*.d.ts` files, please run `npm run check`',
   );
 
-  assert(packageJSON.types, 'Missing "types".');
-  const supportedTSVersions = Object.keys(packageJSON.typesVersions);
-  assert(
-    supportedTSVersions.length === 1,
-    'Property "typesVersions" should have exactly one key.',
-  );
-  // TODO: revisit once TS implements https://github.com/microsoft/TypeScript/issues/44795
-  fs.writeFileSync(
-    path.join('./npmDist', packageJSON.types),
-    // Provoke syntax error to show this message
-    `"Package 'graphql' support only TS versions that are ${supportedTSVersions[0]}".`,
-  );
-
   fs.copyFileSync('./LICENSE', './npmDist/LICENSE');
   fs.copyFileSync('./README.md', './npmDist/README.md');
 
   // Should be done as the last step so only valid packages can be published
+  const packageJSON = buildPackageJSON();
   writeGeneratedFile('./npmDist/package.json', JSON.stringify(packageJSON));
 
   showDirStats('./npmDist');