Revert "Add comment for posterity"

This reverts commit 742bace.

packages/react-error-overlay/src/utils/unmapper.js

@@ -27,25 +27,6 @@ function count(search: string, string: string): number {
   return count;
 }
 
-function normalizePath(_path: string): string {
-  // `path.normalize` cleans a file path, (e.g. /foo//baz/..//bar/ becomes
-  // /foo/bar/).
-  // The web version of this module only provides POSIX support, so Windows
-  // paths like C:\foo\\baz\..\\bar\ cannot be normalized.
-  // A simple solution to this is to replace all `\` with `/`, then normalize
-  // afterwards.
-  //
-  // Note:
-  // `path.normalize` supports POSIX forward slashes on Windows, but not the
-  // other way around. Converting all backslashes to forward slashes before
-  // normalizing makes this cross platform if it were isomorphic (used server
-  // side).
-  return path.normalize(
-    // Match contiguous backslashes
-    _path.replace(/[\\]+/g, '/')
-  );
-}
-
 /**
  * Turns a set of mapped <code>StackFrame</code>s back into their generated code position and enhances them with code.
  * @param {string} fileUri The URI of the <code>bundle.js</code> file.
@@ -75,15 +56,15 @@ async function unmap(
     }
     let { fileName } = frame;
     if (fileName) {
-      fileName = normalizePath(fileName);
+      fileName = path.normalize(fileName.replace(/[\\]+/g, '/'));
     }
     if (fileName == null) {
       return frame;
     }
     const fN: string = fileName;
     const source = map
       .getSources()
-      .map(normalizePath)
+      .map(s => s.replace(/[\\]+/g, '/'))
       .filter(p => {
         p = path.normalize(p);
         const i = p.lastIndexOf(fN);