chore(docs): Fix unresolved rebase conflict in Migration.MD (#5076)

fix after merging #5054 which left an unresolved conflict in Migration.MD that emerged while rebasing the PR onto the current 7.x branch.

MIGRATION.md

@@ -339,11 +339,7 @@ For our efforts to reduce bundle size of the SDK we had to remove and refactor p
 - Rename `UserAgent` integration to `HttpContext`. (see [#5027](https://github.com/getsentry/sentry-javascript/pull/5027))
 - Remove `SDK_NAME` export from `@sentry/browser`, `@sentry/node`, `@sentry/tracing` and `@sentry/vue` packages.
 - Removed `eventStatusFromHttpCode` to save on bundle size.
-<<<<<<< HEAD
 - Replace `BrowserTracing` `maxTransactionDuration` option with `finalTimeout` option
-- Replace `Session` class with a session object and functions (see [#5054](https://github.com/getsentry/sentry-javascript/pull/5054)).
-=======
->>>>>>> 5c81e32c4 (Add "Session Changes" section to Migration docs)
 
 ## Sentry Angular SDK Changes