Revert of Refactor webrtc_perf_tests into several source_sets.

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 7ddb0bb1e89ff122d88294baef86433029debb2a..f73fa22067389f6ea74172a9877b319b08ae95b4 100644
--- a/webrtc/modules/remote_bitrate_estimator/BUILD.gn
+++ b/webrtc/modules/remote_bitrate_estimator/BUILD.gn
@@ -124,21 +124,4 @@
       "//testing/gtest",
     ]
   }
-
-  rtc_source_set("remote_bitrate_estimator_perf_tests") {
-    testonly = true
-    sources = [
-      "remote_bitrate_estimators_test.cc",
-    ]
-    deps = [
-      ":bwe_simulator_lib",
-      ":remote_bitrate_estimator",
-      "../../base:rtc_base_approved",
-      "../../test:fileutils",
-    ]
-    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" ]
-    }
-  }
 }