diff --git a/payload_consumer/delta_performer.cc b/payload_consumer/delta_performer.cc
index 7375d37..08eba02 100644
--- a/payload_consumer/delta_performer.cc
+++ b/payload_consumer/delta_performer.cc
@@ -429,15 +429,6 @@
 
 }  // namespace
 
-uint32_t DeltaPerformer::GetMinorVersion() const {
-  if (manifest_.has_minor_version()) {
-    return manifest_.minor_version();
-  }
-  return payload_->type == InstallPayloadType::kDelta
-             ? kMaxSupportedMinorPayloadVersion
-             : kFullPayloadMinorVersion;
-}
-
 bool DeltaPerformer::IsHeaderParsed() const {
   return metadata_size_ != 0;
 }
diff --git a/payload_consumer/delta_performer.h b/payload_consumer/delta_performer.h
index 88076af..e4b56c1 100644
--- a/payload_consumer/delta_performer.h
+++ b/payload_consumer/delta_performer.h
@@ -173,10 +173,6 @@
   // Return true if header parsing is finished and no errors occurred.
   bool IsHeaderParsed() const;
 
-  // Returns the delta minor version. If this value is defined in the manifest,
-  // it returns that value, otherwise it returns the default value.
-  uint32_t GetMinorVersion() const;
-
   // Compare |calculated_hash| with source hash in |operation|, return false and
   // dump hash and set |error| if don't match.
   // |source_fd| is the file descriptor of the source partition.