Update DiffEngine.Tests.csproj

Author: SimonCropp

src/DiffEngine.Tests/DiffEngine.Tests.csproj

@@ -16,8 +16,6 @@
     <PackageReference Include="ProjectDefaults" Version="1.0.87" PrivateAssets="all" />
     <PackageReference Include="XunitContext" Version="3.2.5" />
     <ProjectReference Include="..\DiffEngine\DiffEngine.csproj" />
-  </ItemGroup>
-  <ItemGroup Condition="'$(TargetFramework)' != 'net7.0'">
-    <Compile Remove="DefinitionsTest.cs" />
+    <Compile Remove="DefinitionsTest.cs"  Condition="'$(TargetFramework)' != 'net7.0'"/>
   </ItemGroup>
 </Project>