Remove dead code, whitespace.

Author: evoskuil

src/zmq/authenticator.cpp

@@ -51,7 +51,7 @@ authenticator::~authenticator() NOEXCEPT
     stop();
 }
 
-authenticator::operator context& () NOEXCEPT
+authenticator::operator context&() NOEXCEPT
 {
     return context_;
 }

src/zmq/worker.cpp

@@ -33,8 +33,6 @@ namespace zmq {
 
 using namespace bc::system;
 
-#define NAME "worker"
-
 // Derive from this abstract worker to implement concrete worker.
 worker::worker(thread_priority priority) NOEXCEPT
   : priority_(priority),