fix: remove useless check in upgrade command

[szymonrybczak]

Summary:

This PR removes useless check which actually caused error when the version was released less than week ago, and if yes it returns nothing - what caused strange situation. For example if I were on 0.71.11 (latest release) and I ran upgrade command I had an error "Cannot figure out your...", from this line:

cli/packages/cli/src/commands/upgrade/upgrade.ts

Lines 13 to 19 in 4650a8d

	const update = await version.latest(projectDir);
	if (!update?.current) {
	logger.error(
	`Cannot figure out your version of React Native, use: ${chalk.dim(
	url.toString(),
	)}`,
	);

Test Plan:

1. Clone the repository and do all the required steps from the Contributing guide
2. Create app with npx react-native@latest init --version 0.71.10
3. Run this command:

node /path/to/react-native-cli/packages/cli/build/bin.js upgrade

This command should give this output:

To upgrade React Native please follow the instructions here:

  https://react-native-community.github.io/upgrade-helper?from=0.71.10&to=0.71.11