Move over to ABSL logging and flags.

Removes gperftools too since that wants gflags.

Here come the fireworks.

Change-Id: I79cb7bcf60f1047fbfa28bfffc21a0fd692e4b1c
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/y2023/joystick_republish.cc b/y2023/joystick_republish.cc
index ae6f340..9ea6a1a 100644
--- a/y2023/joystick_republish.cc
+++ b/y2023/joystick_republish.cc
@@ -1,7 +1,7 @@
 #include <sys/resource.h>
 #include <sys/time.h>
 
-#include "glog/logging.h"
+#include "absl/flags/flag.h"
 
 #include "aos/configuration.h"
 #include "aos/events/shm_event_loop.h"
@@ -9,13 +9,13 @@
 #include "aos/init.h"
 #include "frc971/input/joystick_state_generated.h"
 
-DEFINE_string(config, "aos_config.json", "Config file to use.");
+ABSL_FLAG(std::string, config, "aos_config.json", "Config file to use.");
 
 int main(int argc, char *argv[]) {
   aos::InitGoogle(&argc, &argv);
 
   aos::FlatbufferDetachedBuffer<aos::Configuration> config =
-      aos::configuration::ReadConfig(FLAGS_config);
+      aos::configuration::ReadConfig(absl::GetFlag(FLAGS_config));
   aos::ShmEventLoop event_loop(&config.message());
 
   aos::Sender<aos::JoystickState> sender(