Revert "XFAIL tests regressed in GPU RT"

This reverts commit 0585b37.

Author: vladimirlaz

SYCL/ESIMD/private_memory/pm_access_1.cpp

@@ -10,5 +10,3 @@
 // UNSUPPORTED: cuda
 // RUN: %clangxx -fsycl -I%S/.. %S/Inputs/pm_common.cpp -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out 1
-// Regression in GPU RT 21.16.19610
-// XFAIL: level_zero

SYCL/ESIMD/private_memory/pm_access_2.cpp

@@ -10,5 +10,3 @@
 // UNSUPPORTED: cuda
 // RUN: %clangxx -fsycl -I%S/.. %S/Inputs/pm_common.cpp -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out 2
-// Regression in GPU RT 21.16.19610
-// XFAIL: level_zero

SYCL/ESIMD/private_memory/pm_access_3.cpp

@@ -10,5 +10,3 @@
 // UNSUPPORTED: cuda
 // RUN: %clangxx -fsycl -I%S/.. %S/Inputs/pm_common.cpp -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out 3
-// Regression in GPU RT 21.16.19610
-// XFAIL: level_zero

SYCL/USM/badmalloc.cpp

@@ -16,9 +16,6 @@
 
 // This test verifies that things fail in the proper way when they should.
 
-// Regression in GPU RT 21.16.19610
-// XFAIL: level_zero && gpu
-
 #include <CL/sycl.hpp>
 #include <iostream>