remove duplicate props from csproj

src/ImageSharp/ImageSharp.csproj

@@ -14,11 +14,9 @@
 
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
-    <AssemblyName>SixLabors.ImageSharp</AssemblyName>
     <PackageId>SixLabors.ImageSharp</PackageId>
     <PackageTags>Image Resize Crop Gif Jpg Jpeg Bitmap Png Core</PackageTags>
     <RootNamespace>SixLabors.ImageSharp</RootNamespace>
-    <TargetFrameworks>netcoreapp2.1;netstandard1.3;netstandard2.0;net472</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(TargetFramework)' == 'netcoreapp2.1' OR '$(TargetFramework)' == 'net472' ">

tests/ImageSharp.Tests/ImageSharp.Tests.csproj

@@ -8,11 +8,9 @@
     <DebugType Condition="$(codecov) != ''">full</DebugType>
     <DebugType Condition="$(codecov) == ''">portable</DebugType>
     <DebugSymbols>True</DebugSymbols>
-    <RootNamespace>SixLabors.ImageSharp.Tests</RootNamespace>
     <AssemblyName>SixLabors.ImageSharp.Tests</AssemblyName>
     <Platforms>AnyCPU;x64;x86</Platforms>
     <RootNamespace>SixLabors.ImageSharp.Tests</RootNamespace>
-    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>