Remove Unreal version from cirrus log

[timbotimbo]

Relevant components:

• Signalling server
• Frontend library
• Frontend UI library
• Matchmaker
• Platform scripts
• SFU

Problem statement:

The master, 5.5 and 5.4 branches still log that Cirrus is for Unreal 5.3
Running Cirrus - The Pixel Streaming reference implementation signalling server for Unreal Engine 5.3

Solution

As this version number isn't very important and it has proven easy to forget on updates, just remove it.
Running Cirrus - The Pixel Streaming reference implementation signalling server for Unreal Engine

Documentation

N / A

Test Plan and Compatibility

N / A

[lukehb]

@timbotimbo We had a chat internally, yep, we think removing it is okay. What we doing right now is working on #10 - so there will be a completely new Cirrus soon anyway so we are not too concerned about removing the version logging from the existing Cirrus. In the new Cirrus we are thinking we will log the package.json version of the signalling server, as this is useful for debugging, but not mention any specific pairing with a version of UE.

CC @mcottontensor As a note to add the proposed logging of version number into the new cirrus.