refactor: simplify toPosixPath for the sake of coverage

Author: forivall

src/rules/no-relative-packages.js

@@ -6,11 +6,10 @@ import moduleVisitor, { makeOptionsSchema } from 'eslint-module-utils/moduleVisi
 import importType from '../core/importType';
 import docsUrl from '../docsUrl';
 
-/** @type {(filePath: string) => string} */
-const toPosixPath =
-  path.sep === '\\'
-    ? (filePath) => filePath.replace(/\\/g, '/')
-    : (filePath) => filePath;
+/** @param {string} filePath */
+function toPosixPath(filePath) {
+  return filePath.replace(/\\/g, '/');
+}
 
 function findNamedPackage(filePath) {
   const found = readPkgUp({ cwd: filePath });