Revert of GN: Refactor modules_unittests to eliminate package boundary violations.

webrtc/modules/remote_bitrate_estimator/BUILD.gn

Index: webrtc/modules/remote_bitrate_estimator/BUILD.gn
diff --git a/webrtc/modules/remote_bitrate_estimator/BUILD.gn b/webrtc/modules/remote_bitrate_estimator/BUILD.gn
index 2bec90fa8cefba28f938da6e3e66f55e70bddae3..81028f6b634de4430b8a5b04c7e215f2a8dd421f 100644
--- a/webrtc/modules/remote_bitrate_estimator/BUILD.gn
+++ b/webrtc/modules/remote_bitrate_estimator/BUILD.gn
@@ -185,36 +185,4 @@
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
-
-  rtc_test("bwe_simulator") {
-    testonly = true
-
-    sources = [
-      "bwe_simulations.cc",
-    ]
-    deps = [
-      ":bwe_simulator_lib",
-      ":remote_bitrate_estimator",
-      "../..:webrtc_common",
-      "../../base:rtc_base_approved",
-      "../../test:test_common",
-      "../../test:test_main",
-      "../video_capture",
-      "//testing/gmock",
-      "//testing/gtest",
-      "//third_party/gflags",
-    ]
-
-    if (!build_with_chromium && is_clang) {
-      # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
-      suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
-    }
-
-    if (is_win) {
-      cflags = [
-        # TODO(kjellander): bugs.webrtc.org/261: Fix this warning.
-        "/wd4373",  # virtual function override.
-      ]
-    }
-  }
 }