[MERGE #3981 @sigatrev] ARM64: remove erroneous comment and check
[MERGE #3981 @sigatrev] ARM64: remove erroneous comment and check

Merge pull request #3981 from sigatrev:arm64-misc

mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore