C# Where are these assembly references coming from?

Question

I have a .csproj where under references it lists Entity Framework and several SQLite assemblies. I want to remove them but they keep coming back. There is no nuget.config in the project. And this project does not reference SQLite. The reference part of the .csproj file makes not references to them:

<ItemGroup>
    <Reference Include="PdfSharp-gdi, Version=1.50.5147.0, Culture=neutral, PublicKeyToken=f94615aa0424f9eb, processorArchitecture=MSIL">
      <HintPath>..\Packages\PDFsharp-gdi.1.50.5147\lib\net20\PdfSharp-gdi.dll</HintPath>
    </Reference>
    <Reference Include="PdfSharp.Charting-gdi, Version=1.50.5147.0, Culture=neutral, PublicKeyToken=f94615aa0424f9eb, processorArchitecture=MSIL">
      <HintPath>..\Packages\PDFsharp-gdi.1.50.5147\lib\net20\PdfSharp.Charting-gdi.dll</HintPath>
    </Reference>
    <Reference Include="LocalLib">
      <HintPath>..\..\localpath\bin\LocalLib.dll</HintPath>
    </Reference>
    <Reference Include="System" />
    <Reference Include="System.Core" />
    <Reference Include="System.Drawing" />
    <Reference Include="System.Xml.Linq" />
    <Reference Include="System.Data.DataSetExtensions" />
    <Reference Include="Microsoft.CSharp" />
    <Reference Include="System.Data" />
    <Reference Include="System.Net.Http" />
    <Reference Include="System.Xml" />
</ItemGroup>

But within VS2019, Entity Framework is listed in the references along with SQLite assemblies. Where is it finding there references and how do I get rid of them?