Remove unused #define in quality_scaler.cc

Bug: None
Change-Id: I8a4f130d90fa5e3c251945c333b2ac584e5e0662
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/277001
Reviewed-by: Åsa Persson <asapersson@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38240}
diff --git a/modules/video_coding/utility/quality_scaler.cc b/modules/video_coding/utility/quality_scaler.cc
index 28252b4..9fb41a0 100644
--- a/modules/video_coding/utility/quality_scaler.cc
+++ b/modules/video_coding/utility/quality_scaler.cc
@@ -21,12 +21,6 @@
 #include "rtc_base/numerics/exp_filter.h"
 #include "rtc_base/weak_ptr.h"
 
-// TODO(kthelgason): Some versions of Android have issues with log2.
-// See https://code.google.com/p/android/issues/detail?id=212634 for details
-#if defined(WEBRTC_ANDROID)
-#define log2(x) (log(x) / log(2))
-#endif
-
 namespace webrtc {
 
 namespace {