diff --git a/src/System.Management.Automation/security/CatalogHelper.cs b/src/System.Management.Automation/security/CatalogHelper.cs
index 4b68cc86f6..787f0c234a 100644
--- a/src/System.Management.Automation/security/CatalogHelper.cs
+++ b/src/System.Management.Automation/security/CatalogHelper.cs
@@ -3,18 +3,12 @@
 
 #if !UNIX
 
-using Dbg = System.Management.Automation;
-using System;
-using System.Text;
 using System.Security.Cryptography;
 using System.Collections.Generic;
-using System.Collections;
 using System.Collections.ObjectModel;
-using System.ComponentModel;
 using System.IO;
 using System.Linq;
 using System.Management.Automation.Internal;
-using System.Management.Automation.Provider;
 using System.Management.Automation.Security;
 using System.Runtime.InteropServices;
 using DWORD = System.UInt32;
diff --git a/src/System.Management.Automation/security/MshSignature.cs b/src/System.Management.Automation/security/MshSignature.cs
index df20f7d0e6..c4113d7a5a 100644
--- a/src/System.Management.Automation/security/MshSignature.cs
+++ b/src/System.Management.Automation/security/MshSignature.cs
@@ -5,7 +5,6 @@ using System.ComponentModel;
 using System.Management.Automation.Internal;
 using System.Security.Cryptography.X509Certificates;
 
-using Dbg = System.Management.Automation;
 using DWORD = System.UInt32;
 
 namespace System.Management.Automation
diff --git a/src/System.Management.Automation/security/nativeMethods.cs b/src/System.Management.Automation/security/nativeMethods.cs
index 2131fee698..a48c430f23 100644
--- a/src/System.Management.Automation/security/nativeMethods.cs
+++ b/src/System.Management.Automation/security/nativeMethods.cs
@@ -7,7 +7,6 @@
 using System.Runtime.InteropServices;
 using System.Security.Cryptography.X509Certificates;
 using System.Management.Automation.Internal;
-using System.Runtime.ConstrainedExecution;
 using DWORD = System.UInt32;
 using BOOL = System.UInt32;
 
diff --git a/src/System.Management.Automation/security/wldpNativeMethods.cs b/src/System.Management.Automation/security/wldpNativeMethods.cs
index e9665f4dfa..5d4b49270c 100644
--- a/src/System.Management.Automation/security/wldpNativeMethods.cs
+++ b/src/System.Management.Automation/security/wldpNativeMethods.cs
@@ -7,7 +7,6 @@
 #if !UNIX
 
 using System.Management.Automation.Internal;
-using Microsoft.Win32;
 using System.Runtime.InteropServices;
 using System.Diagnostics.CodeAnalysis;