Cleanup proj file.

Author: Oren (electricessence)

Open.Disposable.csproj

@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;netstandard2.1</TargetFrameworks>
+		<LangVersion>latest</LangVersion>
 		<Nullable>enable</Nullable>
 		<GeneratePackageOnBuild>True</GeneratePackageOnBuild>
 		<Authors>electricessence</Authors>
@@ -21,20 +22,12 @@ Part of the "Open" set of libraries.
 		<IncludeSymbols>true</IncludeSymbols>
 		<SymbolPackageFormat>snupkg</SymbolPackageFormat>
 		<PackageIcon>logo.png</PackageIcon>
-  </PropertyGroup>
+	</PropertyGroup>
 
 	<ItemGroup>
 		<PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
 	</ItemGroup>
 
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
-    <LangVersion>latest</LangVersion>
-  </PropertyGroup>
-
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
-    <LangVersion>latest</LangVersion>
-  </PropertyGroup>
-
   <ItemGroup>
     <None Remove=".git" />
     <None Remove=".gitignore" />
@@ -50,8 +43,4 @@ Part of the "Open" set of libraries.
     <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
   </ItemGroup>
 
-  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.1' ">
-
-  </ItemGroup>
-
 </Project>