Remove support for old getUserMedia video constraints algorithm.

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index 7f741009aed056a76e6a8628829472e4b84391dc..994c6b362696dfe8834f272eedba376df90c6327 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -151,10 +151,6 @@ const base::Feature kMediaDocumentDownloadButton{
 const base::Feature kMediaStreamOldAudioConstraints{
     "MediaStreamOldAudioConstraints", base::FEATURE_ENABLED_BY_DEFAULT};
 
-// Enables the old algorithm for processing video constraints in getUserMedia().
-const base::Feature kMediaStreamOldVideoConstraints{
-    "MediaStreamOldVideoConstraints", base::FEATURE_DISABLED_BY_DEFAULT};
-
 // Enables the memory coordinator.
 // WARNING:
 // The memory coordinator is not ready for use and enabling this may cause