diff --git a/turbo/trie/retain_list_builder.go b/turbo/trie/retain_list_builder.go
deleted file mode 100644
index 62a057debf0..00000000000
--- a/turbo/trie/retain_list_builder.go
+++ /dev/null
@@ -1,86 +0,0 @@
-package trie
-
-import (
-	libcommon "github.com/ledgerwatch/erigon-lib/common"
-
-	"github.com/ledgerwatch/erigon/common"
-)
-
-// RetainListBuilder is the structure that accumulates the list of keys that were read or changes (touched) during
-// the execution of a block. It also tracks the contract codes that were created and used during the execution
-// of a block
-type RetainListBuilder struct {
-	touches        [][]byte                    // Read/change set of account keys (account hashes)
-	storageTouches [][]byte                    // Read/change set of storage keys (account hashes concatenated with storage key hashes)
-	proofCodes     map[libcommon.Hash]struct{} // Contract codes that have been accessed (codeHash)
-	createdCodes   map[libcommon.Hash]struct{} // Contract codes that were created (deployed) (codeHash)
-}
-
-// NewRetainListBuilder creates new ProofGenerator and initialised its maps
-func NewRetainListBuilder() *RetainListBuilder {
-	return &RetainListBuilder{
-		proofCodes:   make(map[libcommon.Hash]struct{}),
-		createdCodes: make(map[libcommon.Hash]struct{}),
-	}
-}
-
-// AddTouch adds a key (in KEY encoding) into the read/change set of account keys
-func (rlb *RetainListBuilder) AddTouch(touch []byte) {
-	rlb.touches = append(rlb.touches, common.CopyBytes(touch))
-}
-
-// AddStorageTouch adds a key (in KEY encoding) into the read/change set of storage keys
-func (rlb *RetainListBuilder) AddStorageTouch(touch []byte) {
-	rlb.storageTouches = append(rlb.storageTouches, common.CopyBytes(touch))
-}
-
-// ExtractTouches returns accumulated read/change sets and clears them for the next block's execution
-func (rlb *RetainListBuilder) ExtractTouches() ([][]byte, [][]byte) {
-	touches := rlb.touches
-	storageTouches := rlb.storageTouches
-	rlb.touches = nil
-	rlb.storageTouches = nil
-	return touches, storageTouches
-}
-
-// extractCodeTouches returns the set of all contract codes that were required during the block's execution
-// but were not created during that same block. It also clears the set for the next block's execution
-func (rlb *RetainListBuilder) extractCodeTouches() map[libcommon.Hash]struct{} {
-	proofCodes := rlb.proofCodes
-	rlb.proofCodes = make(map[libcommon.Hash]struct{})
-	rlb.createdCodes = make(map[libcommon.Hash]struct{})
-	return proofCodes
-}
-
-// ReadCode registers that given contract code has been accessed during current block's execution
-func (rlb *RetainListBuilder) ReadCode(codeHash libcommon.Hash) {
-	if _, ok := rlb.proofCodes[codeHash]; !ok {
-		rlb.proofCodes[codeHash] = struct{}{}
-	}
-}
-
-// CreateCode registers that given contract code has been created (deployed) during current block's execution
-func (rlb *RetainListBuilder) CreateCode(codeHash libcommon.Hash) {
-	if _, ok := rlb.proofCodes[codeHash]; !ok {
-		rlb.createdCodes[codeHash] = struct{}{}
-	}
-}
-
-func (rlb *RetainListBuilder) Build() *RetainList {
-	rl := NewRetainList(0)
-
-	touches, storageTouches := rlb.ExtractTouches()
-	codeTouches := rlb.extractCodeTouches()
-
-	for _, touch := range touches {
-		rl.AddKey(touch)
-	}
-	for _, touch := range storageTouches {
-		rl.AddKey(touch)
-	}
-	for codeHash := range codeTouches {
-		rl.AddCodeTouch(codeHash)
-	}
-
-	return rl
-}