Removing try catch on package missing exception

base fetcher fails right below so no point in allowing package.json to
be missing here if it's not supported in base

Author: kav

src/fetchers/copy-fetcher.js

@@ -8,30 +8,18 @@ import {MessageError} from '../errors.js';
 
 export default class CopyFetcher extends BaseFetcher {
   async _fetch(): Promise<FetchedOverride> {
-    try {
-      const {files} = await this.config.readManifest(this.reference, this.registry);
-      if (files) {
-        await Promise.all(
-          ['package.json'].concat(files).map(fileName => {
-            const source = path.join(this.reference, fileName);
-            const destination = path.join(this.dest, fileName);
-            return fs.copy(source, destination, this.reporter);
-          }),
-        );
-
-        return {
-          hash: this.hash || '',
-          resolved: null,
-        };
-      }
-    } catch (err) {
-      if (err instanceof MessageError) {
-        this.reporter.warn(err);
-      } else {
-        throw err;
-      }
+    const {files} = await this.config.readManifest(this.reference, this.registry);
+    if (files) {
+      await Promise.all(
+        ['package.json'].concat(files).map(fileName => {
+          const source = path.join(this.reference, fileName);
+          const destination = path.join(this.dest, fileName);
+          return fs.copy(source, destination, this.reporter);
+        }),
+      );
+    } else {
+      await fs.copy(this.reference, this.dest, this.reporter);
     }
-    await fs.copy(this.reference, this.dest, this.reporter);
     return {
       hash: this.hash || '',
       resolved: null,