Do not check VNDK from Fastboot test

As of VNDK deprecation, fastboot will no longer have vndk-version
property. As there is no good rule to decide if vndk-version should be
checked, and also vndk-version property is not used from internal, the
test can be removed. This change removes testVndkVersion from
FastbootGetvarUserspaceTest.

Bug: 320853029
Test: Test passed from Husky
Change-Id: If6b53a563818d91bf25e7d9174b160e904628b45
1 file changed