Revert "Parameterize SmartTransactionsController state by ChainId for…

… MultiChain + Integrate PollingController Mixin (#235)

* Revert "Parameterize SmartTransactionsController state by ChainId for MultiChain + Integrate PollingController Mixin (#210)"

This reverts commit a9f5004.

* rebase cleanup

jest.config.js

@@ -6,10 +6,10 @@ module.exports = {
   coverageReporters: ['text', 'html'],
   coverageThreshold: {
     global: {
-      branches: 76.5,
-      functions: 92.5,
-      lines: 93.35,
-      statements: 93.35,
+      branches: 77,
+      functions: 89,
+      lines: 92,
+      statements: 91,
     },
   },
   moduleFileExtensions: ['js', 'json', 'jsx', 'ts', 'tsx', 'node'],

package.json

@@ -25,12 +25,12 @@
     "test:watch": "jest --watchAll"
   },
   "dependencies": {
+    "@ethersproject/bignumber": "^5.7.0",
     "@ethersproject/bytes": "^5.7.0",
+    "@ethersproject/providers": "^5.7.0",
     "@metamask/base-controller": "^3.2.1",
     "@metamask/controller-utils": "^5.0.0",
-    "@metamask/eth-query": "^3.0.1",
     "@metamask/network-controller": "^15.0.0",
-    "@metamask/polling-controller": "^0.2.0",
     "bignumber.js": "^9.0.1",
     "fast-json-patch": "^3.1.0",
     "lodash": "^4.17.21"