diff --git a/store/cachekv/memiterator.go b/store/cachekv/memiterator.go
deleted file mode 100644
index 04df40ff56aa..000000000000
--- a/store/cachekv/memiterator.go
+++ /dev/null
@@ -1,56 +0,0 @@
-package cachekv
-
-import (
-	"bytes"
-
-	dbm "github.com/tendermint/tm-db"
-
-	"github.com/cosmos/cosmos-sdk/store/types"
-)
-
-// Iterates over iterKVCache items.
-// if key is nil, means it was deleted.
-// Implements Iterator.
-type memIterator struct {
-	types.Iterator
-
-	lastKey []byte
-	deleted map[string]struct{}
-}
-
-func newMemIterator(start, end []byte, items *dbm.MemDB, deleted map[string]struct{}, ascending bool) *memIterator {
-	var iter types.Iterator
-	var err error
-
-	if ascending {
-		iter, err = items.Iterator(start, end)
-	} else {
-		iter, err = items.ReverseIterator(start, end)
-	}
-
-	if err != nil {
-		panic(err)
-	}
-
-	return &memIterator{
-		Iterator: iter,
-
-		lastKey: nil,
-		deleted: deleted,
-	}
-}
-
-func (mi *memIterator) Value() []byte {
-	key := mi.Iterator.Key()
-	// We need to handle the case where deleted is modified and includes our current key
-	// We handle this by maintaining a lastKey object in the iterator.
-	// If the current key is the same as the last key (and last key is not nil / the start)
-	// then we are calling value on the same thing as last time.
-	// Therefore we don't check the mi.deleted to see if this key is included in there.
-	reCallingOnOldLastKey := (mi.lastKey != nil) && bytes.Equal(key, mi.lastKey)
-	if _, ok := mi.deleted[string(key)]; ok && !reCallingOnOldLastKey {
-		return nil
-	}
-	mi.lastKey = key
-	return mi.Iterator.Value()
-}
diff --git a/x/staking/keeper/delegation.go b/x/staking/keeper/delegation.go
index 91987df4d76b..2acdaa564eb0 100644
--- a/x/staking/keeper/delegation.go
+++ b/x/staking/keeper/delegation.go
@@ -664,7 +664,7 @@ func (k Keeper) Delegate(
 		validatorLastPower := sdk.TokensToConsensusPower(validator.Tokens, k.PowerReduction(ctx))
 
 		// Get the new power of the validator if delegated the bond amount
-		validatorNewPower := int64(validatorLastPower) + sdk.TokensToConsensusPower(bondAmt, k.PowerReduction(ctx))
+		validatorNewPower := validatorLastPower + sdk.TokensToConsensusPower(bondAmt, k.PowerReduction(ctx))
 
 		// Compute what the Total Consensus Power would be if this Delegation goes through
 		newTotalPower := lastPower.Int64() + sdk.TokensToConsensusPower(bondAmt, k.PowerReduction(ctx))
diff --git a/x/staking/keeper/msg_server.go b/x/staking/keeper/msg_server.go
index 4c4e70d4f1f8..c301604b78e2 100644
--- a/x/staking/keeper/msg_server.go
+++ b/x/staking/keeper/msg_server.go
@@ -255,7 +255,7 @@ func (k msgServer) Delegate(goCtx context.Context, msg *types.MsgDelegate) (*typ
 		ctx.Logger().Info(fmt.Sprintf("lastPower of Validator is %d", validatorLastPower))
 
 		// Compute what the Validator's new power would be if this Delegation goes through
-		validatorNewPower := int64(validatorLastPower) + sdk.TokensToConsensusPower(msg.Amount.Amount, k.Keeper.PowerReduction(ctx))
+		validatorNewPower := validatorLastPower + sdk.TokensToConsensusPower(msg.Amount.Amount, k.Keeper.PowerReduction(ctx))
 
 		// Compute what the Total Consensus Power would be if this Delegation goes through
 		newTotalPower := lastPower.Int64() + sdk.TokensToConsensusPower(msg.Amount.Amount, k.Keeper.PowerReduction(ctx))