Remove DTO source generator (#1764)

This has become more hassle than it's worth. This goes back to
old-fashioned copy/paste.

TeachingRecordSystem/Directory.Build.props

@@ -7,13 +7,12 @@
     <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
 
     <IsTestProject Condition="'$(IsTestProject)' == '' and $(MSBuildProjectName.EndsWith('Tests'))">true</IsTestProject>
-    <IsSourceGeneratorProject Condition="'$(IsSourceGeneratorProject)' == '' and $(MSBuildProjectName.EndsWith('Generator'))">true</IsSourceGeneratorProject>
 
     <UserSecretsId>TeachingRecordSystem</UserSecretsId>
     <UserSecretsId Condition="'$(IsTestProject)' == 'true'">TeachingRecordSystemTests</UserSecretsId>
   </PropertyGroup>
 
-  <ItemGroup Condition="'$(IsSourceGeneratorProject)' != 'true'">
+  <ItemGroup>
     <Using Include="Microsoft.EntityFrameworkCore" />
     <Using Include="TeachingRecordSystem.Core" />
     <Using Include="TeachingRecordSystem.Core.CoreConstants" Static="true" />
@@ -23,7 +22,7 @@
     <Using Include="TeachingRecordSystem.Core.Events.Models" Alias="EventModels" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(IsTestProject)' != 'true' and '$(IsSourceGeneratorProject)' != 'true'">
+  <ItemGroup Condition="'$(IsTestProject)' != 'true'">
     <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>

TeachingRecordSystem/TeachingRecordSystem.sln

@@ -49,10 +49,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TeachingRecordSystem.UiTest
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TeachingRecordSystem.AuthorizeAccess.EndToEndTests", "tests\TeachingRecordSystem.AuthorizeAccess.EndToEndTests\TeachingRecordSystem.AuthorizeAccess.EndToEndTests.csproj", "{2D7946CB-44D2-431D-A9E1-A4472FACC1DC}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "gen", "gen", "{5E273A79-2EA3-46CD-9049-769F880868FE}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TeachingRecordSystem.Api.Generator", "gen\TeachingRecordSystem.Api.Generator\TeachingRecordSystem.Api.Generator.csproj", "{7EA8C0A7-C149-4928-8E37-55D44976D765}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -267,18 +263,6 @@ Global
 		{2D7946CB-44D2-431D-A9E1-A4472FACC1DC}.Release|x64.Build.0 = Release|Any CPU
 		{2D7946CB-44D2-431D-A9E1-A4472FACC1DC}.Release|x86.ActiveCfg = Release|Any CPU
 		{2D7946CB-44D2-431D-A9E1-A4472FACC1DC}.Release|x86.Build.0 = Release|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Debug|x64.ActiveCfg = Debug|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Debug|x64.Build.0 = Debug|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Debug|x86.Build.0 = Debug|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Release|Any CPU.Build.0 = Release|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Release|x64.ActiveCfg = Release|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Release|x64.Build.0 = Release|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Release|x86.ActiveCfg = Release|Any CPU
-		{7EA8C0A7-C149-4928-8E37-55D44976D765}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -301,7 +285,6 @@ Global
 		{08E99A19-AD1F-4F95-BF13-31248D486799} = {91DCFC76-6636-4AC1-B81C-7F8AE1F22116}
 		{B22223A8-9CB0-4B60-B516-18FD684CF01D} = {91DCFC76-6636-4AC1-B81C-7F8AE1F22116}
 		{2D7946CB-44D2-431D-A9E1-A4472FACC1DC} = {91DCFC76-6636-4AC1-B81C-7F8AE1F22116}
-		{7EA8C0A7-C149-4928-8E37-55D44976D765} = {5E273A79-2EA3-46CD-9049-769F880868FE}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {61D239F9-888B-4D01-84BC-9276C92383EA}