diff --git a/config-model-api/abi-spec.json b/config-model-api/abi-spec.json
index de482c8f01a4..a2fccab24328 100644
--- a/config-model-api/abi-spec.json
+++ b/config-model-api/abi-spec.json
@@ -1325,7 +1325,6 @@
       "public boolean useV8GeoPositions()",
       "public int maxCompactBuffers()",
       "public java.util.List ignoredHttpUserAgents()",
-      "public boolean enableProxyProtocolMixedMode()",
       "public java.lang.String logFileCompressionAlgorithm(java.lang.String)",
       "public java.lang.String summaryDecodePolicy()",
       "public int contentLayerMetadataFeatureLevel()",
diff --git a/config-model-api/src/main/java/com/yahoo/config/model/api/ModelContext.java b/config-model-api/src/main/java/com/yahoo/config/model/api/ModelContext.java
index 8359c6e5728d..2f2d63237d25 100644
--- a/config-model-api/src/main/java/com/yahoo/config/model/api/ModelContext.java
+++ b/config-model-api/src/main/java/com/yahoo/config/model/api/ModelContext.java
@@ -106,7 +106,6 @@ interface FeatureFlags {
         @ModelFeatureFlag(owners = {"arnej"}) default boolean useV8GeoPositions() { return false; }
         @ModelFeatureFlag(owners = {"baldersheim", "geirst", "toregge"}) default int maxCompactBuffers() { return 1; }
         @ModelFeatureFlag(owners = {"arnej", "andreer"}) default List<String> ignoredHttpUserAgents() { return List.of(); }
-        @ModelFeatureFlag(owners = {"tokle"}, removeAfter = "8.458.13") default boolean enableProxyProtocolMixedMode() { return false; }
         @ModelFeatureFlag(owners = {"arnej"}) default String logFileCompressionAlgorithm(String defVal) { return defVal; }
         @ModelFeatureFlag(owners = {"baldersheim"}, comment = "Select summary decode type") default String summaryDecodePolicy() { return "eager"; }
         @ModelFeatureFlag(owners = {"vekterli"}) default int contentLayerMetadataFeatureLevel() { return 0; }