Remove unused includes of gflags and gtest

Change-Id: Ie299a043c1095db4f85bd434f4bd9517e7641e06

internal/ceres/bundle_adjustment_test_util.h

diff --git a/internal/ceres/bundle_adjustment_test_util.h b/internal/ceres/bundle_adjustment_test_util.h
index 8e6197d..6b45d46 100644
--- a/internal/ceres/bundle_adjustment_test_util.h
+++ b/internal/ceres/bundle_adjustment_test_util.h
@@ -46,9 +46,7 @@
 #include "ceres/stringprintf.h"
 #include "ceres/test_util.h"
 #include "ceres/types.h"
-#include "gflags/gflags.h"
 #include "glog/logging.h"
-#include "gtest/gtest.h"
 
 namespace ceres {
 namespace internal {

internal/ceres/evaluation_benchmark.cc

diff --git a/internal/ceres/evaluation_benchmark.cc b/internal/ceres/evaluation_benchmark.cc
index d089f9b..1fdc8d2 100644
--- a/internal/ceres/evaluation_benchmark.cc
+++ b/internal/ceres/evaluation_benchmark.cc
@@ -42,7 +42,6 @@
 #include "ceres/problem_impl.h"
 #include "ceres/program.h"
 #include "ceres/sparse_matrix.h"
-#include "gflags/gflags.h"
 
 namespace ceres::internal {