refactor: remove some unused exports

src/plugins/babel-plugin-transform-typescript-metadata/serialize-type.ts

@@ -109,7 +109,7 @@ function serializeTypeReferenceNode(
  * expression or identifier is a reference to self (class name).
  * In this case, we just emit `Object` in order to avoid ReferenceError.
  */
-export function isClassType(className: string, node: t.Expression): boolean {
+function isClassType(className: string, node: t.Expression): boolean {
   switch (node.type) {
     case "Identifier": {
       return node.name === className;

src/plugins/transform-module/index.ts

@@ -25,7 +25,7 @@ import { transformDynamicImport } from "./dynamic-import";
 import { defineCommonJSHook, makeInvokers } from "./hooks";
 import { lazyImportsHook } from "./lazy";
 
-export interface Options extends PluginOptions {
+interface Options extends PluginOptions {
   allowCommonJSExports?: boolean;
   allowTopLevelThis?: boolean;
   importInterop?: RewriteModuleStatementsAndPrepareHeaderOptions["importInterop"];

src/resolve.ts

@@ -88,7 +88,7 @@ export function jitiResolve(
   throw lastError;
 }
 
-export function tryNativeRequireResolve(
+function tryNativeRequireResolve(
   ctx: Context,
   id: string,
   parentURL: URL | string,

src/utils.ts

@@ -33,10 +33,6 @@ export function md5(content: string, len = 8) {
   return createHash("md5").update(content).digest("hex").slice(0, len);
 }
 
-export function isObject(val: any) {
-  return val !== null && typeof val === "object";
-}
-
 export function readNearestPackageJSON(path: string): PackageJson | undefined {
   while (path && path !== "." && path !== "/") {
     path = join(path, "..");