Revert "Fix modification of IR_Reduction's target in CUDA_ReplaceReductionAccesses strat."

This reverts commit 613066bf

Compiler/src/exastencils/parallelization/api/cuda/CUDA_HandleFragmentLoopsWithReduction.scala

@@ -59,9 +59,8 @@ case class CUDA_HandleFragmentLoopsWithReduction(
     var replacement : IR_Expression = IR_NullExpression
 
     this += new Transformation("Replace", {
-      case red : IR_Reduction => red
       case expr : IR_Expression if expr == redTarget => Duplicate(replacement)
-    }, recursive = false)
+    })
   }
 
   def matrixAssignment(stdFunc : String, dst : IR_Expression, src : IR_Expression, size : Int) =