Removing no longer used Graph usings

Author: KoenZomers

src/ALC/ALC.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.002.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PnP.PowerShell.ALC", "PnP.PowerShell.ALC.csproj", "{0BFB8F61-512F-405A-BC8A-7D2C804A5963}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{0BFB8F61-512F-405A-BC8A-7D2C804A5963}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0BFB8F61-512F-405A-BC8A-7D2C804A5963}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0BFB8F61-512F-405A-BC8A-7D2C804A5963}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0BFB8F61-512F-405A-BC8A-7D2C804A5963}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {B34EA9CD-BE09-4B3E-ADF7-CC08EB6BDA39}
+	EndGlobalSection
+EndGlobal

src/Commands/Base/ConnectOnline.cs

@@ -1,7 +1,5 @@
-using Microsoft.Graph;
-using Microsoft.SharePoint.Client;
+using Microsoft.SharePoint.Client;
 using PnP.Framework;
-using PnP.PowerShell.Commands.Apps;
 using PnP.PowerShell.Commands.Base.PipeBinds;
 using PnP.PowerShell.Commands.Enums;
 using PnP.PowerShell.Commands.Model;

src/Commands/Model/SharePoint/SPConsumingTenantContainersByOwningAppId.cs

@@ -1,12 +1,7 @@
-using Microsoft.Graph;
-using Microsoft.Online.SharePoint.TenantAdministration;
+using Microsoft.Online.SharePoint.TenantAdministration;
 using Microsoft.Online.SharePoint.TenantManagement;
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Runtime.Serialization;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace PnP.PowerShell.Commands.Model.SharePoint
 {