diff --git a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-gradle-plugin-idea-proto.txt b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-gradle-plugin-idea-proto.txt
index 1b173ce54f3..32a9cd3f904 100644
--- a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-gradle-plugin-idea-proto.txt
+++ b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-gradle-plugin-idea-proto.txt
@@ -1,10 +1,8 @@
 public final class org/jetbrains/kotlin/kpm/idea/proto/KpmIdeaProto {
-	public static final fun IdeaKpmProject (Lorg/jetbrains/kotlin/gradle/kpm/idea/serialize/IdeaKpmSerializationContext;Lcom/google/protobuf/ByteString;)Lorg/jetbrains/kotlin/gradle/kpm/idea/IdeaKpmProject;
 	public static final fun IdeaKpmProject (Lorg/jetbrains/kotlin/gradle/kpm/idea/serialize/IdeaKpmSerializationContext;Ljava/io/InputStream;)Lorg/jetbrains/kotlin/gradle/kpm/idea/IdeaKpmProject;
 	public static final fun IdeaKpmProject (Lorg/jetbrains/kotlin/gradle/kpm/idea/serialize/IdeaKpmSerializationContext;Ljava/nio/ByteBuffer;)Lorg/jetbrains/kotlin/gradle/kpm/idea/IdeaKpmProject;
 	public static final fun IdeaKpmProject (Lorg/jetbrains/kotlin/gradle/kpm/idea/serialize/IdeaKpmSerializationContext;[B)Lorg/jetbrains/kotlin/gradle/kpm/idea/IdeaKpmProject;
 	public static final fun toByteArray (Lorg/jetbrains/kotlin/gradle/kpm/idea/IdeaKpmProject;Lorg/jetbrains/kotlin/gradle/kpm/idea/serialize/IdeaKpmSerializationContext;)[B
-	public static final fun toByteString (Lorg/jetbrains/kotlin/gradle/kpm/idea/IdeaKpmProject;Lorg/jetbrains/kotlin/gradle/kpm/idea/serialize/IdeaKpmSerializationContext;)Lcom/google/protobuf/ByteString;
 	public static final fun writeTo (Lorg/jetbrains/kotlin/gradle/kpm/idea/IdeaKpmProject;Ljava/io/OutputStream;Lorg/jetbrains/kotlin/gradle/kpm/idea/serialize/IdeaKpmSerializationContext;)V
 }
 
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/main/kotlin/org/jetbrains/kotlin/kpm/idea/proto/container.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/main/kotlin/org/jetbrains/kotlin/kpm/idea/proto/container.kt
index 6a9a82fc355..f80f74eeded 100644
--- a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/main/kotlin/org/jetbrains/kotlin/kpm/idea/proto/container.kt
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/main/kotlin/org/jetbrains/kotlin/kpm/idea/proto/container.kt
@@ -8,7 +8,6 @@
 
 package org.jetbrains.kotlin.kpm.idea.proto
 
-import com.google.protobuf.ByteString
 import com.google.protobuf.InvalidProtocolBufferException
 import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmProject
 import org.jetbrains.kotlin.gradle.kpm.idea.serialize.IdeaKpmSerializationContext
@@ -24,10 +23,6 @@ fun IdeaKpmSerializationContext.IdeaKpmProject(data: ByteBuffer): IdeaKpmProject
     return IdeaKpmProject(data) { IdeaKpmContainerProto.parseFrom(data) }
 }
 
-fun IdeaKpmSerializationContext.IdeaKpmProject(data: ByteString): IdeaKpmProject? {
-    return IdeaKpmProject(data) { IdeaKpmContainerProto.parseFrom(data) }
-}
-
 fun IdeaKpmSerializationContext.IdeaKpmProject(stream: InputStream): IdeaKpmProject? {
     return IdeaKpmProject(stream) { IdeaKpmContainerProto.parseFrom(stream) }
 }
@@ -47,10 +42,6 @@ fun IdeaKpmProject.toByteArray(context: IdeaKpmSerializationContext): ByteArray
     return context.IdeaKpmContainerProto(this).toByteArray()
 }
 
-fun IdeaKpmProject.toByteString(context: IdeaKpmSerializationContext): ByteString {
-    return context.IdeaKpmContainerProto(this).toByteString()
-}
-
 fun IdeaKpmProject.writeTo(output: OutputStream, context: IdeaKpmSerializationContext) {
     context.IdeaKpmContainerProto(this).writeDelimitedTo(output)
 }