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/control_loops/superstructure/arm/BUILD b/y2023/control_loops/superstructure/arm/BUILD
index a54f72c..c8ecaff 100644
--- a/y2023/control_loops/superstructure/arm/BUILD
+++ b/y2023/control_loops/superstructure/arm/BUILD
@@ -171,7 +171,7 @@
         "//frc971/control_loops:fixed_quadrature",
         "//frc971/control_loops/double_jointed_arm:ekf",
         "//y2023/control_loops/superstructure/roll:roll_plants",
-        "@com_github_gflags_gflags//:gflags",
+        "@com_google_absl//absl/flags:flag",
         "@org_tuxfamily_eigen//:eigen",
     ],
 )