UCS: Remove valgrind error counter test.
UCS: Remove valgrind error counter test.

 This is not needed since valgrind error counter is checked in the end
of every test.

abouteiller/ucx,abouteiller/ucx,miked-mellanox/ucx,sergsagal1/ucx_rocm,miked-mellanox/ucx,biddisco/ucx,manjugv/ucx,biddisco/ucx,shssf/ucx,manjugv/ucx,sergsagal1/ucx_rocm,biddisco/ucx,shssf/ucx,miked-mellanox/ucx,shssf/ucx,manjugv/ucx,sergsagal1/ucx_rocm,abouteiller/ucx,abouteiller/ucx