Remove image check when loading number of files

Checking if an image is processable when loading the directory slowed
 down the initial loading of the directories significantly.
7ms vs 180ms in a small test with about 400 images.
User should not have any other files in these folders.
Other methods still contain sanity checks.

picture-gallery-server/src/fsExtension.ts

@@ -1,34 +1,14 @@
 import fs from "fs";
 import * as path from "path";
-import sharp from "sharp";
 import { Folders } from "./models";
 import { publicPath, thumbnailPath } from "./paths";
-import { consoleLogger } from "./logging";
-
-const isImageProcessable = async (filePath: string): Promise<boolean> =>
-  sharp(filePath)
-    .metadata()
-    .then(() => true)
-    .catch((err) => {
-      consoleLogger.error(
-        `Reading metadata from ${filePath} produced the following error: ${err.message}`,
-      );
-      return false;
-    });
 
 export const walk = async (dirPath: string): Promise<Folders> => {
   const dirEnts = fs.readdirSync(path.posix.join(publicPath, dirPath), {
     withFileTypes: true,
   });
 
-  const numberOfFiles = (
-    await Promise.all(
-      dirEnts
-        .filter((f) => f.isFile())
-        .map((f) => path.posix.join(publicPath, dirPath, f.name))
-        .map(isImageProcessable),
-    )
-  ).filter((a) => a).length;
+  const numberOfFiles = dirEnts.filter((f) => f.isFile()).length;
 
   const children = await Promise.all(
     dirEnts