Revert "error for non-system, non-vendor fuzzer"

This reverts commit c3f083e7.

Reason for revert: isForPlatform doesn't mean is system, so this
check broke vendor fuzzers.

Change-Id: I042f7b6333e305c1ea32317d080a5d8a7cd061c9
Fixes: 369745670 
Fixes: 374535599
Fixes: 374542669
Fixes: 374552568