Removed the ProcessingComponent class

BUG=

Review URL: https://codereview.webrtc.org/1772553002

Cr-Commit-Position: refs/heads/master@{#11950}
diff --git a/webrtc/modules/audio_processing/audio_processing.gypi b/webrtc/modules/audio_processing/audio_processing.gypi
index 7a04358..77f0a14 100644
--- a/webrtc/modules/audio_processing/audio_processing.gypi
+++ b/webrtc/modules/audio_processing/audio_processing.gypi
@@ -96,8 +96,7 @@
         'logging/aec_logging_file_handling.h',
         'noise_suppression_impl.cc',
         'noise_suppression_impl.h',
-        'processing_component.cc',
-        'processing_component.h',
+        'render_queue_item_verifier.h',
         'rms_level.cc',
         'rms_level.h',
         'splitting_filter.cc',