[Tests] gitignore file created in tests; remove it in test setup

Author: ljharb

.gitignore

@@ -6,3 +6,6 @@ node_modules
 npm-shrinkwrap.json
 package-lock.json
 yarn.lock
+
+# symlinked file used in tests
+test/resolver/symlinked/_/node_modules/package

test/symlinks.js

@@ -8,6 +8,9 @@ var packageDir = path.join(__dirname, 'resolver', 'symlinked', '_', 'node_module
 try {
     fs.unlinkSync(symlinkDir);
 } catch (err) {}
+try {
+    fs.unlinkSync(packageDir);
+} catch (err) {}
 try {
     fs.symlinkSync('./_/symlink_target', symlinkDir, 'dir');
 } catch (err) {