Revert the change of block null context input

Author: blueww

src/Storage/Commands.Storage/Blob/Cmdlet/StartAzureStorageBlobCopy.cs

@@ -177,7 +177,6 @@ public string SrcContainer
         [Parameter(HelpMessage = "Source Azure Storage Context Object", ValueFromPipeline = true, ValueFromPipelineByPropertyName = true, ParameterSetName = FileParameterSet)]
         [Parameter(HelpMessage = "Source Azure Storage Context Object", ValueFromPipeline = true, ValueFromPipelineByPropertyName = true, ParameterSetName = FileToBlobParameterSet)]
         [Parameter(HelpMessage = "Source Azure Storage Context Object", ParameterSetName = UriParameterSet)]
-        [ValidateNotNull]
         public override AzureStorageContext Context { get; set; }
 
         [Parameter(HelpMessage = "Destination Storage context object", Mandatory = false)]

src/Storage/Commands.Storage/Common/StorageCloudCmdletBase.cs

@@ -43,7 +43,6 @@ public class StorageCloudCmdletBase<T> : AzureDataCmdlet
     {
         [Parameter(HelpMessage = "Azure Storage Context Object",
             ValueFromPipeline = true, ValueFromPipelineByPropertyName = true)]
-        [ValidateNotNull]
         public virtual AzureStorageContext Context { get; set; }
 
         [Parameter(HelpMessage = "The server time out for each request in seconds.")]

src/Storage/Commands.Storage/File/AzureStorageFileCmdletBase.cs

@@ -27,7 +27,6 @@ public abstract class AzureStorageFileCmdletBase : StorageCloudCmdletBase<IStora
             ValueFromPipelineByPropertyName = true,
             ParameterSetName = Constants.ShareNameParameterSetName,
             HelpMessage = "Azure Storage Context Object")]
-        [ValidateNotNull]
         public override AzureStorageContext Context { get; set; }
 
         protected FileRequestOptions RequestOptions

src/Storage/Commands.Storage/File/Cmdlet/GetAzureStorageShare.cs

@@ -47,7 +47,6 @@ public class GetAzureStorageShare : AzureStorageFileCmdletBase
             ValueFromPipelineByPropertyName = true,
             ParameterSetName = Constants.SpecificParameterSetName,
             HelpMessage = "Azure Storage Context Object")]
-        [ValidateNotNull]
         public override AzureStorageContext Context { get; set; }
 
         public override void ExecuteCmdlet()

src/Storage/Commands.Storage/File/Cmdlet/StartAzureStorageFileCopy.cs

@@ -120,7 +120,6 @@ public class StartAzureStorageFileCopyCommand : StorageFileDataManagementCmdletB
             Mandatory = false,
             ValueFromPipelineByPropertyName = true,
             ParameterSetName = ShareNameParameterSet)]
-        [ValidateNotNull]
         public override AzureStorageContext Context { get; set; }
 
         [Parameter(HelpMessage = "Destination Storage context object", ParameterSetName = ContainerNameParameterSet)]