Remove few MIPS checker tests from 552-checker-sharpening

Remove parts of the test where it was tested for the presence of
HMipsComputeBaseMethodAddress node because the node exists just
on MIPS32R2, but not on MIPS32R6 (and thus fails there).

Test: ./testrunner.py --target --optimizing -t 552-checker-sharpening

Change-Id: If0331639a74203f89b21fc7ee83480308b4bf0d6
1 file changed