Revert "Enable the various chrome zlib optimizations."

This reverts commit f026d93d15e62bed8c2ae419a91ad9ee40ee7401.

Reason for revert: breaks NDK builds by assuming Neon.
Bug: http://b/147822878
Change-Id: I51d46aa15eebc7c9eba42a02c77c326fc982412e
1 file changed