Remove action that is no longer true. (#85)

0c78666 changed behavior such that `log_statement = all` is only set when `set_user.block_log_statement = on` and `rolename` is a database superuser. README.md was updated to match but part of a sentence was left behind and e911f62 restored the deleted text apparently thinking it was an accidental deletion rather than an incomplete deletion.

This commit honors the original intent of 0c78666 by removing the action that is no longer true.

Reviewed by David Christensen (@pgguru).

Author: dwsteele

README.md

@@ -52,8 +52,6 @@ Specifically, when an allowed user executes `set_user(text)` or
 * The current effective user becomes `rolename`.
 * The role transition is logged, with a specific notation if `rolename` is a
   superuser.
-* `log_statement` setting is set to "all", meaning every SQL statement executed
-  while in this state will also get logged.
 * If `set_user.block_alter_system` is set to "on", `ALTER SYSTEM` commands will
   be blocked.
 * If `set_user.block_copy_program` is set to "on", `COPY PROGRAM` commands will