removed GPU and ACC test run

Signed-off-by: Byoungro So <[email protected]>

Author: bso-intel

sycl/test/regression/usm_malloc_shared.cpp

@@ -1,8 +1,6 @@
 // RUN: %clangxx -fsycl %s -o %t.out
 // RUN: env SYCL_DEVICE_TYPE=HOST %t.out
 // RUN: %CPU_RUN_PLACEHOLDER %t.out
-// RUN: %GPU_RUN_PLACEHOLDER %t.out
-// RUN: %ACC_RUN_PLACEHOLDER %t.out
 
 // This test checks if users will successfully allocate 160, 0, and -16 bytes of
 // shared memory, and also test user can call free() without worrying about