Remove noop system_wrappers_default build target.

After the removal of field_trial_default, metrics_default and
runtime_enabled_features_default, this build target doesn't build
anything and can be safely removed.

Bug: webrtc:9631
Change-Id: Iee1111e065ffefe0b4b9a695ee67a594e6d82caa
Reviewed-on: https://webrtc-review.googlesource.com/c/103702
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24976}

BUILD.gn

@@ -385,7 +385,6 @@ if (!build_with_chromium) {
       "ortc",
       "rtc_base",
       "sdk",
-      "system_wrappers:system_wrappers_default",
       "video",
     ]
 

modules/audio_coding/BUILD.gn

@@ -1508,7 +1508,6 @@ if (rtc_include_tests) {
         ":neteq_test_tools",
         "../..:webrtc_common",
         "../../rtc_base:rtc_base_approved",
-        "../../system_wrappers:system_wrappers_default",
         "../../test:test_support",
         "//third_party/abseil-cpp/absl/memory",
       ]
@@ -1581,7 +1580,6 @@ if (rtc_include_tests) {
       "../..:webrtc_common",
       "../../api:libjingle_peerconnection_api",
       "../../rtc_base:rtc_base_approved",
-      "../../system_wrappers:system_wrappers_default",
       "../../test:test_main",
       "../audio_processing",
       "//testing/gtest",
@@ -1656,7 +1654,6 @@ if (rtc_include_tests) {
              "../../api/audio_codecs/L16:audio_encoder_L16",
              "../../api/audio_codecs/g722:audio_encoder_g722",
              "../../api/audio_codecs/ilbc:audio_encoder_ilbc",
-             "../../system_wrappers:system_wrappers_default",
              "../../api/audio_codecs/isac:audio_encoder_isac",
              "../../api/audio_codecs/opus:audio_encoder_opus",
              "../../rtc_base:rtc_base_approved",
@@ -1673,7 +1670,6 @@ if (rtc_include_tests) {
     testonly = true
 
     deps = audio_coding_deps + [
-             "../../system_wrappers:system_wrappers_default",
              "../rtp_rtcp:rtp_rtcp_format",
              "../../api:array_view",
              "../../rtc_base:rtc_base_approved",
@@ -1696,7 +1692,6 @@ if (rtc_include_tests) {
     deps = [
       "../../rtc_base:checks",
       "../../rtc_base:rtc_base_approved",
-      "../../system_wrappers:system_wrappers_default",
       "../../test:rtp_test_utils",
       "//testing/gtest",
     ]
@@ -1714,7 +1709,6 @@ if (rtc_include_tests) {
       ":neteq_test_tools",
       ":pcm16b",
       "../../rtc_base:rtc_base_approved",
-      "../../system_wrappers:system_wrappers_default",
       "//testing/gtest",
     ]
   }
@@ -1749,7 +1743,6 @@ if (rtc_include_tests) {
       ":neteq_test_support",
       "../..:webrtc_common",
       "../../rtc_base:rtc_base_approved",
-      "../../system_wrappers:system_wrappers_default",
       "../../test:fileutils",
       "../../test:test_support",
     ]
@@ -1770,7 +1763,6 @@ if (rtc_include_tests) {
       "../..:webrtc_common",
       "../../rtc_base:checks",
       "../../rtc_base:rtc_base_approved",
-      "../../system_wrappers:system_wrappers_default",
       "../../test:fileutils",
       "../../test:test_main",
       "//testing/gtest",

modules/audio_mixer/BUILD.gn

@@ -111,7 +111,6 @@ if (rtc_include_tests) {
       "../../api/audio:audio_mixer_api",
       "../../common_audio",
       "../../rtc_base:rtc_base_approved",
-      "../../system_wrappers:system_wrappers_default",
     ]
   }
 }

modules/audio_processing/BUILD.gn

@@ -539,7 +539,6 @@ if (rtc_include_tests) {
         "../../rtc_base:rtc_task_queue",
         "../../rtc_base:stringutils",
         "../../system_wrappers",
-        "../../system_wrappers:system_wrappers_default",
         "../../test:test_support",
         "aec_dump",
         "aec_dump:aec_dump_impl",

modules/video_capture/BUILD.gn

@@ -190,7 +190,6 @@ if (!build_with_chromium) {
         "../../common_video:common_video",
         "../../rtc_base:rtc_base_approved",
         "../../system_wrappers:system_wrappers",
-        "../../system_wrappers:system_wrappers_default",
         "../../test:video_test_common",
         "../utility",
         "//testing/gtest",

rtc_tools/BUILD.gn

@@ -221,7 +221,6 @@ if (!build_with_chromium) {
       deps = [
         "../modules/audio_device",
         "../modules/audio_device:audio_device_impl",
-        "../system_wrappers:system_wrappers_default",
       ]
     }
   }
@@ -279,7 +278,6 @@ if (!build_with_chromium) {
         "../modules/congestion_controller/goog_cc:estimators",
         "../modules/pacing",
         "../modules/rtp_rtcp",
-        "../system_wrappers:system_wrappers_default",
         "//third_party/abseil-cpp/absl/memory",
       ]
     }
@@ -428,7 +426,6 @@ if (rtc_include_tests) {
         "../modules/audio_processing:audioproc_test_utils",
         "../rtc_base:protobuf_utils",
         "../rtc_base:rtc_base_approved",
-        "../system_wrappers:system_wrappers_default",
       ]
     }  # unpack_aecdump
   }

sdk/BUILD.gn

@@ -1066,7 +1066,6 @@ if (is_ios || is_mac) {
             "../rtc_base:rtc_base",
             "../rtc_base:rtc_base_tests_utils",
             "../system_wrappers:system_wrappers",
-            "../system_wrappers:system_wrappers_default",
             "//third_party/libyuv",
           ]
 
@@ -1182,7 +1181,6 @@ if (is_ios || is_mac) {
           "../modules/video_coding:video_codec_interface",
           "../rtc_base:rtc_base_tests_utils",
           "../rtc_base/system:unused",
-          "../system_wrappers:system_wrappers_default",
           "//test:test_support",
           "//third_party/ocmock",
         ]

system_wrappers/BUILD.gn

@@ -125,12 +125,6 @@ rtc_source_set("metrics") {
   ]
 }
 
-group("system_wrappers_default") {
-  deps = [
-    ":system_wrappers",
-  ]
-}
-
 if (is_android && !build_with_mozilla) {
   rtc_static_library("cpu_features_android") {
     sources = [