[stable] Fix txpool memory leak (#3419)

Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>

Author: AlexeyAkhunov

go.mod

@@ -35,7 +35,7 @@ require (
 	github.com/json-iterator/go v1.1.12
 	github.com/julienschmidt/httprouter v1.3.0
 	github.com/kevinburke/go-bindata v3.21.0+incompatible
-	github.com/ledgerwatch/erigon-lib v0.0.0-20220202093315-e3f672e28f76
+	github.com/ledgerwatch/erigon-lib v0.0.0-20220203181034-d49d18ddaf17
 	github.com/ledgerwatch/log/v3 v3.4.0
 	github.com/ledgerwatch/secp256k1 v1.0.0
 	github.com/logrusorgru/aurora/v3 v3.0.0

go.sum

@@ -499,8 +499,8 @@ github.com/kylelemons/godebug v0.0.0-20170224010052-a616ab194758 h1:0D5M2HQSGD3P
 github.com/kylelemons/godebug v0.0.0-20170224010052-a616ab194758/go.mod h1:B69LEHPfb2qLo0BaaOLcbitczOKLWTsrBG9LczfCD4k=
 github.com/leanovate/gopter v0.2.9 h1:fQjYxZaynp97ozCzfOyOuAGOU4aU/z37zf/tOujFk7c=
 github.com/leanovate/gopter v0.2.9/go.mod h1:U2L/78B+KVFIx2VmW6onHJQzXtFb+p5y3y2Sh+Jxxv8=
-github.com/ledgerwatch/erigon-lib v0.0.0-20220202093315-e3f672e28f76 h1:3wt4XnLRkQmfiKrxV9pvKcy72eDwEcCblyKkbo2eryQ=
-github.com/ledgerwatch/erigon-lib v0.0.0-20220202093315-e3f672e28f76/go.mod h1:BQNYmN6i8RdHqedsztAj3XDnswYebacmFAnsznlisTc=
+github.com/ledgerwatch/erigon-lib v0.0.0-20220203181034-d49d18ddaf17 h1:1WOGytdl1036LxxMLcQp53I+coKrSH0oFkE0NJqamGA=
+github.com/ledgerwatch/erigon-lib v0.0.0-20220203181034-d49d18ddaf17/go.mod h1:BQNYmN6i8RdHqedsztAj3XDnswYebacmFAnsznlisTc=
 github.com/ledgerwatch/log/v3 v3.4.0 h1:SEIOcv5a2zkG3PmoT5jeTU9m/0nEUv0BJS5bzsjwKCI=
 github.com/ledgerwatch/log/v3 v3.4.0/go.mod h1:VXcz6Ssn6XEeU92dCMc39/g1F0OYAjw1Mt+dGP5DjXY=
 github.com/ledgerwatch/secp256k1 v1.0.0 h1:Usvz87YoTG0uePIV8woOof5cQnLXGYa162rFf3YnwaQ=