Removed old metrics from ServiceManager.
Removed old metrics from ServiceManager.

SMatsushi/RAMCloud,rstutsman/RAMCloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,rstutsman/RAMCloud,matrix207/RAMCloud,QingkaiLu/RAMCloud,matrix207/RAMCloud,matrix207/RAMCloud,anirajk/RAMCloud,SMatsushi/RAMCloud,SMatsushi/RAMCloud,utah-scs/RAMCloud,anirajk/RAMCloud,anirajk/RAMCloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,matrix207/RAMCloud,QingkaiLu/RAMCloud,jblomer/ramcloud,matrix207/RAMCloud,matrix207/RAMCloud,utah-scs/RAMCloud,jblomer/ramcloud,anirajk/RAMCloud,alexandermerritt/ramcloud,QingkaiLu/RAMCloud,QingkaiLu/RAMCloud,jblomer/ramcloud,SMatsushi/RAMCloud,QingkaiLu/RAMCloud,anirajk/RAMCloud,rstutsman/RAMCloud,rstutsman/RAMCloud,QingkaiLu/RAMCloud,jblomer/ramcloud,alexandermerritt/ramcloud,alexandermerritt/ramcloud,utah-scs/RAMCloud,jblomer/ramcloud,SMatsushi/RAMCloud,rstutsman/RAMCloud,jblomer/ramcloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,anirajk/RAMCloud,rstutsman/RAMCloud,SMatsushi/RAMCloud