fix: revert change on StabilityPoolTest as it fails some strange reason

packages/contracts/test/StabilityPoolTest.js

@@ -1,6 +1,5 @@
 const deploymentHelper = require("../utils/deploymentHelpers.js")
 const testHelpers = require("../utils/testHelpers.js")
-const timeMachine = require('ganache-time-traveler');
 const th = testHelpers.TestHelper
 const dec = th.dec
 const toBN = th.toBN
@@ -54,6 +53,9 @@ contract('StabilityPool', async accounts => {
 
     before(async () => {
       gasPriceInWei = await web3.eth.getGasPrice()
+    })
+
+    beforeEach(async () => {
       contracts = await deploymentHelper.deployLiquityCore()
       contracts.troveManager = await TroveManagerTester.new()
       contracts.lusdToken = await LUSDToken.new(
@@ -84,17 +86,6 @@ contract('StabilityPool', async accounts => {
       await th.registerFrontEnds(frontEnds, stabilityPool)
     })
 
-    let revertToSnapshot;
-
-    beforeEach(async() => {
-      let snapshot = await timeMachine.takeSnapshot();
-      revertToSnapshot = () => timeMachine.revertToSnapshot(snapshot['result'])
-    });
-
-    afterEach(async() => {
-      await revertToSnapshot();
-    });
-
     // --- provideToSP() ---
     // increases recorded LUSD at Stability Pool
     it("provideToSP(): increases the Stability Pool LUSD balance", async () => {