Fix 552-checker-sharpening for MIPS32R6

We can't have MIPS32R2 or MIPS32R6 specific checker so remove
the problematic one which differ for these two versions.

Test: ./run-test 552-checker-sharpening in QEMU

Change-Id: I5878fcaa5a43195ec98b607e37ee3029a2e57daf
1 file changed