Remove deprecated ReplicaInputConnection

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 1bea0d7e9d986fb77dc1e9bb0ea665e17df91fe9..bc45d362edd5886faf541ca7cd97b6d202a0c700 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -233,11 +233,6 @@ const base::Feature kSendBeaconThrowForBlobWithNonSimpleType{
     base::FEATURE_DISABLED_BY_DEFAULT};
 
 #if defined(OS_ANDROID)
-// Use IME's own thread instead of using main UI thread. It also means that
-// we will not use replica editor and do a round trip to renderer to synchronize
-// with Blink data.
-const base::Feature kImeThread{"ImeThread", base::FEATURE_ENABLED_BY_DEFAULT};
-
 // FeatureList definition for the Seccomp field trial.
 const base::Feature kSeccompSandboxAndroid{"SeccompSandboxAndroid",
                                            base::FEATURE_DISABLED_BY_DEFAULT};