Remove unused devDependencies

package-lock.json

@@ -647,12 +647,6 @@
       "integrity": "sha1-mBjHngWbE1X5fgQooBfIOOkLqBI=",
       "dev": true
     },
-    "base64-js": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.2.1.tgz",
-      "integrity": "sha512-dwVUVIXsBZXwTuwnXI9RK8sBmgq09NDHzyR9SAph9eqk76gKK2JSQmZARC2zRC81JC2QTtxD0ARU5qTS25gIGw==",
-      "dev": true
-    },
     "base64id": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/base64id/-/base64id-2.0.0.tgz",
@@ -796,16 +790,6 @@
         }
       }
     },
-    "buffer": {
-      "version": "5.0.8",
-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.0.8.tgz",
-      "integrity": "sha512-xXvjQhVNz50v2nPeoOsNqWCLGfiv4ji/gXZM28jnVwdLJxH4mFyqgqCKfaK9zf1KUbG6zTkjLOy7ou+jSMarGA==",
-      "dev": true,
-      "requires": {
-        "base64-js": "^1.0.2",
-        "ieee754": "^1.1.4"
-      }
-    },
     "buffer-from": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
@@ -2345,12 +2329,6 @@
       "integrity": "sha512-oTZqweIP51xaGPI4uPa56/Pri/480R+mo7SeU+YETByQNhDG55ycFyNLIgta9vXhILrxXDmF7ZGhqZIcuN0gJQ==",
       "dev": true
     },
-    "ieee754": {
-      "version": "1.1.8",
-      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.1.8.tgz",
-      "integrity": "sha1-vjPUCsEO8ZJnAfbwii2G+/0a0+Q=",
-      "dev": true
-    },
     "ignore": {
       "version": "3.3.7",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.7.tgz",
@@ -5079,12 +5057,6 @@
       "integrity": "sha512-dlNpL2aab3g8CKfGz6rl8FNmGaRWLLn2g/DtSc9IjB30mEdE6XxzPfPSig5BwGSzI+oLxHyETrQGKjrVVhbLCg==",
       "dev": true
     },
-    "whatwg-fetch": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.3.tgz",
-      "integrity": "sha1-nITsLc9oGH/wC8ZOEnS0QhduHIQ=",
-      "dev": true
-    },
     "which": {
       "version": "1.2.14",
       "resolved": "https://registry.npmjs.org/which/-/which-1.2.14.tgz",

package.json

@@ -65,7 +65,6 @@
     "@types/chai": "^4.2.14",
     "babel-eslint": "^10.1.0",
     "bn.js": "^4.11.8",
-    "buffer": "^5.0.8",
     "chai": "^4.1.2",
     "chai-as-promised": "^7.1.1",
     "email-addresses": "3.1.0",
@@ -86,8 +85,7 @@
     "rollup": "^2.38.5",
     "rollup-plugin-terser": "^5.3.0",
     "sinon": "^4.3.0",
-    "typescript": "^4.1.2",
-    "whatwg-fetch": "^2.0.3"
+    "typescript": "^4.1.2"
   },
   "dependencies": {
     "asn1.js": "^5.0.0",