Removing unused usings

Author: dragonfly91

src/ResourceManager/AzureBackup/Commands.AzureBackup/AzureBackupClientAdapter/VaultAdapter.cs

@@ -12,12 +12,9 @@
 // limitations under the License.
 // ----------------------------------------------------------------------------------
 
-using Microsoft.Azure.Commands.AzureBackup.Helpers;
 using Microsoft.Azure.Management.BackupServices.Models;
 using System;
-using System.Collections;
 using System.Collections.Generic;
-using System.Linq;
 
 namespace Microsoft.Azure.Commands.AzureBackup.ClientAdapter
 {

src/ResourceManager/AzureBackup/Commands.AzureBackup/Cmdlets/Vault/NewAzureRMBackupVault.cs

@@ -16,7 +16,6 @@
 using Microsoft.Azure.Commands.AzureBackup.Models;
 using Microsoft.Azure.Commands.AzureBackup.Properties;
 using System;
-using System.Collections;
 using System.Management.Automation;
 
 namespace Microsoft.Azure.Commands.AzureBackup.Cmdlets

src/ResourceManager/AzureBackup/Commands.AzureBackup/Cmdlets/Vault/SetAzureRMBackupVault.cs

@@ -16,7 +16,6 @@
 using Microsoft.Azure.Commands.AzureBackup.Models;
 using Microsoft.Azure.Commands.AzureBackup.Properties;
 using System;
-using System.Collections;
 using System.Management.Automation;
 using CmdletModel = Microsoft.Azure.Commands.AzureBackup.Models;
 

src/ResourceManager/AzureBackup/Commands.AzureBackup/Models/AzurePSBackupVault.cs

@@ -14,7 +14,6 @@
 
 using Microsoft.Azure.Commands.AzureBackup.Properties;
 using System;
-using System.Collections;
 
 namespace Microsoft.Azure.Commands.AzureBackup.Models
 {