diff --git a/src/Microsoft.Extensions.Localization/ResourceManagerStringLocalizer.cs b/src/Microsoft.Extensions.Localization/ResourceManagerStringLocalizer.cs
index 976d612fa7..128c1c1f6a 100644
--- a/src/Microsoft.Extensions.Localization/ResourceManagerStringLocalizer.cs
+++ b/src/Microsoft.Extensions.Localization/ResourceManagerStringLocalizer.cs
@@ -22,7 +22,6 @@ namespace Microsoft.Extensions.Localization
         private readonly IResourceNamesCache _resourceNamesCache;
         private readonly ResourceManager _resourceManager;
         private readonly IResourceStringProvider _resourceStringProvider;
-        private readonly AssemblyWrapper _resourceAssemblyWrapper;
         private readonly string _resourceBaseName;
 
         /// <summary>
@@ -43,10 +42,6 @@ namespace Microsoft.Extensions.Localization
                 baseName,
                 resourceNamesCache)
         {
-            if (resourceAssembly == null)
-            {
-                throw new ArgumentNullException(nameof(resourceAssembly));
-            }
         }
 
         /// <summary>
@@ -63,7 +58,6 @@ namespace Microsoft.Extensions.Localization
                   baseName,
                   resourceNamesCache)
         {
-            _resourceAssemblyWrapper = resourceAssemblyWrapper;
         }
 
         /// <summary>