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/y2018/control_loops/python/BUILD b/y2018/control_loops/python/BUILD
index fcedf40..d286ce0 100644
--- a/y2018/control_loops/python/BUILD
+++ b/y2018/control_loops/python/BUILD
@@ -107,7 +107,8 @@
     target_compatible_with = ["@platforms//cpu:x86_64"],
     deps = [
         "//third_party/matplotlib-cpp",
-        "@com_github_gflags_gflags//:gflags",
+        "@com_google_absl//absl/flags:flag",
+        "@com_google_absl//absl/flags:parse",
     ],
 )