revert: bundle @sendbird/chat as peer dependency (#320)

Even though it is more desirable,
Adding `@sendbird/chat` as peer dependency fails the bundled library 
Need to investigate more

package.json

@@ -45,7 +45,6 @@
   "author": "SendBird <[email protected]>",
   "license": "SEE LICENSE IN LICENSE.md",
   "peerDependencies": {
-    "@sendbird/chat": "^4.0.11",
     "css-vars-ponyfill": "^2.3.2",
     "date-fns": "^2.16.1",
     "prop-types": "^15.7.2",

rollup.config.js

@@ -38,7 +38,8 @@ module.exports = ({
     },
   ],
   external: [
-    '@sendbird/chat',
+    // unbundled version of @sendbird/chat fails in production
+    // '@sendbird/chat',
     'react-dom/server',
     'prop-types',
     'react',

scripts/package.template.json

@@ -26,8 +26,7 @@
     "date-fns": "^2.16.1",
     "prop-types": "^15.7.2",
     "react": "^16.8.6 || ^17.0.0 || ^18.0.0",
-    "react-dom": "^16.8.6 || ^17.0.0 || ^18.0.0",
-    "@sendbird/chat": "^4.0.11"
+    "react-dom": "^16.8.6 || ^17.0.0 || ^18.0.0"
   },
   "dependencies": {
     "@sendbird/chat": "^4.0.11",