remove logging of expected exceptions in connection_established? method

Author: busterb

lib/msf/core/db_manager/connection.rb

@@ -124,8 +124,6 @@ def connection_established?
         ActiveRecord::Base.connection.active?
       }
     rescue ActiveRecord::ConnectionNotEstablished, PG::ConnectionBad => error
-      elog("Connection not established: #{error.class} #{error}:\n#{error.backtrace.join("\n")}")
-
       false
     end
   end