chore: remove unused base-64 shim

As all runtimes now support atob and btoa, the base-64 shim is not used.

Originally introduced in #28 (b08e380).

- https://developer.mozilla.org/en-US/docs/Web/API/atob#browser_compatibility
- https://developer.mozilla.org/en-US/docs/Web/API/btoa#browser_compatibility

package.json

@@ -209,7 +209,6 @@
     "appium-adb": "^9.11.4",
     "asyncstorage-down": "4.2.0",
     "axios": "^1.6.8",
-    "base-64": "1.0.0",
     "bignumber.js": "^9.0.1",
     "buffer": "6.0.3",
     "cockatiel": "^3.1.2",

shim.js

@@ -1,5 +1,3 @@
-/* eslint-disable import/no-nodejs-modules */
-import { decode, encode } from 'base-64';
 import {
   FIXTURE_SERVER_PORT,
   isTest,
@@ -15,14 +13,6 @@ if (isTest) {
     : FIXTURE_SERVER_PORT;
 }
 
-if (!global.btoa) {
-  global.btoa = encode;
-}
-
-if (!global.atob) {
-  global.atob = decode;
-}
-
 // Fix for https://github.com/facebook/react-native/issues/5667
 if (typeof global.self === 'undefined') {
   global.self = global;

yarn.lock

@@ -11949,11 +11949,6 @@ base-64@0.1.0, base-64@^0.1.0:
   resolved "https://registry.yarnpkg.com/base-64/-/base-64-0.1.0.tgz#780a99c84e7d600260361511c4877613bf24f6bb"
   integrity sha1-eAqZyE59YAJgNhURxId2E78k9rs=
 
-base-64@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/base-64/-/base-64-1.0.0.tgz#09d0f2084e32a3fd08c2475b973788eee6ae8f4a"
-  integrity sha512-kwDPIFCGx0NZHog36dj+tHiwP4QMzsZ3AgMViUBKI0+V5n4U0ufTCUMhnQ04diaRI8EX/QcPfql7zlhZ7j4zgg==
-
 base-x@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/base-x/-/base-x-1.1.0.tgz#42d3d717474f9ea02207f6d1aa1f426913eeb7ac"