tests: benchmarks: move app_kernel to unified kernel.

Deleted the instance of app_kernel in tests/legacy/benchmark.

JIRA: ZEP-1980
Change-Id: I5a6e073d9b0c870be0cc7d8ae5bb352b11d7f97e
Signed-off-by: Adithya Baglody <adithya.nagaraj.baglody@intel.com>
27 files changed