Remove the warning issued by intrinsic emitter when an entry in the
`IntrinsicsToAttributesMap` is > 16 bits. The exact conditions under
which this happen is tightly coupled with how the intrinsic emitter
represents intrinsic attributes and generally this warning may not be
actionable in any way without changing the semantics of the intrinsics
being compiled (i.e., changing their attributes to have less number of
unique attributes).
d82a6eba65