R1:43539b220ce2

Remove trivial cases of unreachable code

Summary:
Static code analysis can detect `Unreachable statement - code above always terminates.`
The vast majority of occurrences in the Phorge codebase are due to an unreachable `break` within a `case` after a `return` or after an all-covering `if/else`.
All this noise makes it harder to spot real logic issues (there are some!), thus fix these trivial cases.

Test Plan: Examine the code; run static code analysis.

Reviewers: O1 Blessed Committers, valerio.bozzolan…