build: remove duplicate npm dependency (#326)

* build: remove duplicate npm dependency

* Fix naming error
Co-authored-by: Mark Tyneway <mark.tyneway@gmail.com>
Co-authored-by: Kelvin Fichter <kelvinfichter@gmail.com>

packages/contracts/package.json

@@ -36,7 +36,6 @@
   "dependencies": {
     "@eth-optimism/core-utils": "^0.1.8",
     "@eth-optimism/dev": "^1.1.1",
-    "@eth-optimism/core-utils": "^0.1.5",
     "@eth-optimism/solc": "^0.6.12-alpha.1",
     "@ethersproject/abstract-provider": "^5.0.8",
     "@ethersproject/contracts": "^5.0.5",

packages/contracts/test/contracts/OVM/chain/OVM_CanonicalTransactionChain.gas.spec.ts

@@ -152,7 +152,7 @@ describe('[GAS BENCHMARK] OVM_CanonicalTransactionChain', () => {
         (transactionTemplate.slice(2).length / 2) * 16 * numTxs
 
       const res = await appendSequencerBatch(OVM_CanonicalTransactionChain, {
-        shouldStartAtBatch: 0,
+        shouldStartAtElement: 0,
         totalElementsToAppend: numTxs,
         contexts: [
           {
@@ -192,7 +192,7 @@ describe('[GAS BENCHMARK] OVM_CanonicalTransactionChain', () => {
         (transactionTemplate.slice(2).length / 2) * 16 * numTxs
 
       const res = await appendSequencerBatch(OVM_CanonicalTransactionChain, {
-        shouldStartAtBatch: 0,
+        shouldStartAtElement: 0,
         totalElementsToAppend: numTxs,
         contexts: [...Array(numTxs)].map(() => {
           return {