[SYCL] Reenable previously failing tests (#1172)

This reverts commit 2250b17.

Author: steffenlarsen

SYCL/DiscardEvents/invalid_event_exceptions.cpp

@@ -5,9 +5,6 @@
 // RUN: %GPU_RUN_PLACEHOLDER %t.out
 // RUN: %ACC_RUN_PLACEHOLDER %t.out
 //
-// Temporarily disabled on Windows.
-// UNSUPPORTED: windows
-//
 // The test checks 3 things:
 // 1. An attempt to construct a queue with both properties(discard_events and
 // enable_profiling) throws an exception.

SYCL/Plugin/level_zero_batch_event_status.cpp

@@ -1,9 +1,6 @@
 // See https://github.com/intel/llvm-test-suite/issues/906
 // REQUIRES: gpu, level_zero
 
-// Temporarily disabled on Windows.
-// UNSUPPORTED: windows
-
 // RUN: %clangxx -fsycl -fsycl-unnamed-lambda -fsycl-targets=%sycl_triple  %s -o %t.out
 
 // Set batching to 4 explicitly

SYCL/USM/depends_on.cpp

@@ -4,9 +4,6 @@
 // RUN: %GPU_RUN_PLACEHOLDER %t1.out
 // RUN: %ACC_RUN_PLACEHOLDER %t1.out
 
-// Temporarily disabled on Windows.
-// UNSUPPORTED: windows
-
 //==----------------- depends_on.cpp - depends_on test ---------------------==//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.