test: Remove unused FileSystem extension methods

src/tests/Recyclarr.TestLibrary/MockFileSystemExtensions.cs

@@ -1,31 +0,0 @@
-using System.IO.Abstractions;
-
-namespace Recyclarr.TestLibrary;
-
-public static class MockFileSystemExtensions
-{
-    public static void AddEmptyFile(this MockFileSystem fs, string path)
-    {
-        fs.AddFile(path, new MockFileData(""));
-    }
-
-    public static void AddEmptyFile(this MockFileSystem fs, IFileInfo path)
-    {
-        fs.AddEmptyFile(path.FullName);
-    }
-
-    public static void AddDirectory(this MockFileSystem fs, IDirectoryInfo path)
-    {
-        fs.AddDirectory(path.FullName);
-    }
-
-    public static void AddFile(this MockFileSystem fs, IFileInfo path, MockFileData data)
-    {
-        fs.AddFile(path.FullName, data);
-    }
-
-    public static MockFileData GetFile(this MockFileSystem fs, IFileInfo path)
-    {
-        return fs.GetFile(path.FullName);
-    }
-}