Remove temporarily enabled test

Author: simonrozsival

src/libraries/tests.proj

@@ -337,7 +337,6 @@
 
   <ItemGroup Condition="'$(RunSmokeTestsOnly)' == 'true'">
     <ProjectReference Include="$(MSBuildThisFileDirectory)System.Runtime\tests\System.Runtime.Tests.csproj" />
-    <ProjectReference Include="$(MSBuildThisFileDirectory)System.Diagnostics.Process/tests/System.Diagnostics.Process.Tests.csproj" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(RunSmokeTestsOnly)' != 'true'">