Revert "MB-11917 Async couch_view_parser implementation"

This reverts commit 3bf0b23892a11299ff5cc25e3d1ebf83e3beec9f.
Reverting async couch_view_parser implementation as it is
resulting in lexical error and also not helping in resolving
erlang scheduler collapse issue.

Change-Id: I94f1cc5c0eb78bcbd95e321b0ed4d43870cc439b
Reviewed-on: http://review.couchbase.org/43633
Reviewed-by: Harsha H S <hhs.couchbase@gmail.com>
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Nimish Gupta <nimish@couchbase.com>