diff --git a/PerfectNumbers.Core/Cpu/MersenneNumberDivisorByDivisorPrimeScanSessionWithTemplate.cs b/PerfectNumbers.Core/Cpu/MersenneNumberDivisorByDivisorPrimeScanSessionWithTemplate.cs
index c88f060..cd06b14 100644
--- a/PerfectNumbers.Core/Cpu/MersenneNumberDivisorByDivisorPrimeScanSessionWithTemplate.cs
+++ b/PerfectNumbers.Core/Cpu/MersenneNumberDivisorByDivisorPrimeScanSessionWithTemplate.cs
@@ -7,16 +7,6 @@ using PerfectNumbers.Core.Gpu.Accelerators;
 using System.Runtime.CompilerServices;
 
 
-#if DivisorSet_Pow2Groups
-using TesterCpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPow2GroupsDivisorSetForCpuOrder;
-using TesterHybrid = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPow2GroupsDivisorSetForHybridOrder;
-using TesterGpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPow2GroupsDivisorSetForGpuOrder;
-#else
-using TesterCpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForOneByOneDivisorSetForCpuOrder;
-using TesterHybrid = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForOneByOneDivisorSetForHybridOrder;
-using TesterGpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForOneByOneDivisorSetForGpuOrder;
-#endif
-
 #if DivisorSet_Pow2Groups
 using TesterCpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPow2GroupsDivisorSetForCpuOrder;
 using TesterHybrid = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPow2GroupsDivisorSetForHybridOrder;