Remove slow_tests

repeating_task_unittests no longer relies on sleeps, so slow_tests
is no longer needed.

Bug: webrtc:12808
Change-Id: Ie9ad23e065074638fe3770e51fb7be83344160e7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/237804
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Evan Shrubsole <eshr@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35351}
diff --git a/tools_webrtc/coverage/generate_coverage_command.py b/tools_webrtc/coverage/generate_coverage_command.py
index 894731b..7c701f8 100644
--- a/tools_webrtc/coverage/generate_coverage_command.py
+++ b/tools_webrtc/coverage/generate_coverage_command.py
@@ -17,7 +17,7 @@
 
 TESTS = [
     'video_capture_tests', 'webrtc_nonparallel_tests', 'video_engine_tests',
-    'tools_unittests', 'test_support_unittests', 'slow_tests',
+    'tools_unittests', 'test_support_unittests',
     'system_wrappers_unittests', 'rtc_unittests', 'rtc_stats_unittests',
     'rtc_pc_unittests', 'rtc_media_unittests', 'peerconnection_unittests',
     'modules_unittests', 'modules_tests', 'low_bandwidth_audio_test',
diff --git a/tools_webrtc/coverage/generate_ios_coverage_command.py b/tools_webrtc/coverage/generate_ios_coverage_command.py
index 4feaacd..e51bfa7 100644
--- a/tools_webrtc/coverage/generate_ios_coverage_command.py
+++ b/tools_webrtc/coverage/generate_ios_coverage_command.py
@@ -61,7 +61,6 @@
     'rtc_pc_unittests',
     'rtc_stats_unittests',
     'rtc_unittests',
-    'slow_tests',
     'system_wrappers_unittests',
     'test_support_unittests',
     'tools_unittests',