Remove 8kB read-ahead from couch_file

In production it showed an increased input Erlang IO and increased binary
memory usage.

See attached file in Jira ticket:

COUCHDB-3284
1 file changed
tree: cbfb4e97644de2106692e291adc264e7f9dd4c21
  1. include/
  2. priv/
  3. src/
  4. test/
  5. .gitignore
  6. .travis.yml
  7. LICENSE
  8. rebar.config.script