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/frc971/zeroing/pulse_index.cc b/frc971/zeroing/pulse_index.cc
index 6e9a502..30da4a9 100644
--- a/frc971/zeroing/pulse_index.cc
+++ b/frc971/zeroing/pulse_index.cc
@@ -3,7 +3,8 @@
 #include <cmath>
 #include <limits>
 
-#include "glog/logging.h"
+#include "absl/log/check.h"
+#include "absl/log/log.h"
 
 namespace frc971::zeroing {