Remove unnecessary server locks.

server.go

@@ -167,22 +167,16 @@ func (s *Server) LogPath() string {
 
 // Retrieves the current state of the server.
 func (s *Server) State() string {
-	// s.mutex.Lock()
-	// defer s.mutex.Unlock()
 	return s.state
 }
 
 // Retrieves the current term of the server.
 func (s *Server) Term() uint64 {
-	s.mutex.Lock()
-	defer s.mutex.Unlock()
 	return s.currentTerm
 }
 
 // Retrieves the name of the candidate this server voted for in this term.
 func (s *Server) VotedFor() string {
-	s.mutex.Lock()
-	defer s.mutex.Unlock()
 	return s.votedFor
 }