lmkd: Remove stale dependency on libprocessgroup

Remove stale dependencies and header file inclusions

Change-Id: Ic0e7adb5bd2a0832937a831b6918e52ace4ad46a
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

Android.bp

@@ -4,7 +4,6 @@ cc_binary {
     srcs: ["lmkd.c"],
     shared_libs: [
         "liblog",
-        "libprocessgroup",
         "libcutils",
     ],
     cflags: ["-Werror"],

lmkd.c

@@ -29,13 +29,11 @@
 #include <sys/mman.h>
 #include <sys/socket.h>
 #include <sys/types.h>
-#include <time.h>
 #include <unistd.h>
 
 #include <cutils/properties.h>
 #include <cutils/sockets.h>
 #include <log/log.h>
-#include <processgroup/processgroup.h>
 
 /*
  * Define LMKD_TRACE_KILLS to record lmkd kills in kernel traces