Removed usage of the the redundant the render alignment headroom in AEC3

Bug: webrtc:8671
Change-Id: I1b7b1bc2f4677bbd375fc206c166b4b9fed3efce
Reviewed-on: https://webrtc-review.googlesource.com/35220
Commit-Queue: Per Åhgren <peah@webrtc.org>
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21392}

modules/audio_processing/aec3/block_processor.cc

@@ -182,9 +182,8 @@ void BlockProcessorImpl::ProcessCapture(
 
   // Remove the echo from the capture signal.
   echo_remover_->ProcessCapture(
-      delay_controller_->AlignmentHeadroomSamples(), echo_path_variability,
-      capture_signal_saturation, render_buffer_->GetRenderBuffer(),
-      capture_block);
+      echo_path_variability, capture_signal_saturation,
+      render_buffer_->GetRenderBuffer(), capture_block);
 
   // Update the metrics.
   metrics_.UpdateCapture(false);