remove unused checkpointAndCommit

remix-lib/src/execution/execution-context.js

@@ -238,20 +238,6 @@ function ExecutionContext () {
     }
   }
 
-  this.checkpointAndCommit = function (cb, checkpointCount) {
-    // due to issue https://github.com/ethereumjs/ethereumjs-vm/issues/567
-    if (this.vm().stateManager._checkpointCount > (checkpointCount || 0)) {
-      return this.vm().stateManager.commit(() => {
-        cb()
-      })
-    }
-    this.vm().stateManager.checkpoint(() => {
-      this.vm().stateManager.commit(() => {
-        cb()
-      })
-    })
-  }
-
   this.currentblockGasLimit = function () {
     return this.blockGasLimit
   }

remix-simulator/src/genesis.js

@@ -17,11 +17,9 @@ function generateBlock () {
     uncleHeaders: []
   })
 
-  executionContext.checkpointAndCommit(() => {
   executionContext.vm().runBlock({ block: block, generate: true, skipBlockValidation: true, skipBalance: false }, function () {
     executionContext.addBlock(block)
   })
-  })
 }
 
 module.exports = generateBlock