Inline doorman methods

Author: JimBobSquarePants

src/ImageSharp.Web/Caching/Doorman.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
 
 namespace SixLabors.ImageSharp.Web.Caching
@@ -88,6 +89,7 @@ public Task<Releaser> WriterLockAsync()
             }
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void ReaderRelease()
         {
             TaskCompletionSource<Releaser> toWake = null;
@@ -111,6 +113,7 @@ private void ReaderRelease()
             toWake?.SetResult(new Releaser(this, true));
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void WriterRelease()
         {
             TaskCompletionSource<Releaser> toWake = null;
@@ -168,4 +171,4 @@ public void Dispose()
             }
         }
     }
-}
+}

src/ImageSharp.Web/Caching/PhysicalFileSystemCacheResolver.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
-using System;
 using System.IO;
 using System.Threading.Tasks;
 using Microsoft.Extensions.FileProviders;