[SYCL] Re-enable DiscardEvents/invalid_event.cpp (intel/llvm-test-suite#960)

Signed-off-by: Pavel Samolysov <[email protected]>

Author: Pavel Samolysov

SYCL/DiscardEvents/invalid_event.cpp

@@ -1,6 +1,4 @@
 // FIXME: Fails on HIP and OpenCL accelerator
-// See https://github.com/intel/llvm-test-suite/issues/810
-// REQUIRES: TEMPORARILY_DISABLED
 // UNSUPPORTED: hip, (opencl && accelerator)
 // RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %s -o %t.out
 //