ONSAM-1505 (oneapi-src#1069)

Remove extension namespaces from reduction.

Author: KanclerzPiotr

DirectProgramming/DPC++/MapReduce/MonteCarloPi/src/monte_carlo_pi.cpp

@@ -87,7 +87,7 @@ double MonteCarloPi(rgb image_plot[]) {
 
       // Monte Carlo Procedure + Reduction
       h.parallel_for(nd_range<1>(num_wg * size_wg, size_wg),
-                     ext::oneapi::reduction(total_acc, 0, std::plus<int>()),
+                     reduction(total_acc, 0, std::plus<int>()),
                      [=](nd_item<1> it, auto& total_acc) {
                        // Index for accessing buffers
                        int i = it.get_global_id();

DirectProgramming/DPC++/N-BodyMethods/Nbody/src/GSimulation.cpp

@@ -161,12 +161,10 @@ void GSimulation::Start() {
     // Second kernel updates the velocity and position for all particles
     q.submit([&](handler& h) {
        auto p = pbuf.get_access(h);
-       #if(__SYCL_COMPILER_VERSION <= 20200827)
-       h.parallel_for(ndrange, intel::reduction(energy, 0.f, std::plus<RealType>()), [=](nd_item<1> it, auto& energy) {
-       #else
-       h.parallel_for(ndrange, ext::oneapi::reduction(energy, 0.f, std::plus<RealType>()), [=](nd_item<1> it, auto& energy) {
-       #endif
-	 auto i = it.get_global_id();
+       h.parallel_for(ndrange, reduction(energy, 0.f, std::plus<RealType>()), [=](nd_item<1> it, auto& energy) {
+	       
+         auto i = it.get_global_id();
+         
          p[i].vel[0] += p[i].acc[0] * dt;  // 2flops
          p[i].vel[1] += p[i].acc[1] * dt;  // 2flops
          p[i].vel[2] += p[i].acc[2] * dt;  // 2flops