fixed broken project file.

src/NzbDrone.Api.Test/NzbDrone.Api.Test.csproj

@@ -48,9 +48,6 @@
     <Reference Include="FluentAssertions.Core, Version=4.19.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a, processorArchitecture=MSIL">
       <HintPath>..\packages\FluentAssertions.4.19.0\lib\net40\FluentAssertions.Core.dll</HintPath>
     </Reference>
-    <Reference Include="nunit.framework, Version=3.5.0.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
-      <HintPath>..\packages\NUnit.3.5.0\lib\net40\nunit.framework.dll</HintPath>
-      <Private>True</Private>
     <Reference Include="Moq, Version=4.2.1510.2205, Culture=neutral, PublicKeyToken=69f491c39445e920, processorArchitecture=MSIL">
       <HintPath>..\packages\Moq.4.2.1510.2205\lib\net40\Moq.dll</HintPath>
     </Reference>