UI: Removed Two Mstack Messages at Round Begin (#1528)

Merge after #1524

In an effort to reduce the spam in the mstack at round begin, I removed
these two messages. They add no important information to the game and
are kinda redundant.


![image](https://github.com/TTT-2/TTT2/assets/13639408/917be0d6-9a91-483f-91a4-751f29f87e32)

CHANGELOG.md

@@ -75,6 +75,7 @@ All notable changes to TTT2 will be documented here. Inspired by [keep a changel
 ### Removed
 
 - Removed radio tab in shop UI
+- Removed `round_restart`, `round_selected` and `round_started` MStack messages to reduce message spawm (by @TimGoll)
 - Removed the old tips panel visible to spectators (moved to the new loading screen) (by @TimGoll)
 
 ### Breaking Changes

gamemodes/terrortown/gamemode/server/sv_main.lua

@@ -1249,8 +1249,6 @@ function BeginRound()
     -- anymore.
     roleselection.SelectRoles()
 
-    LANG.Msg("round_selected")
-
     -- Edge case where a player joins just as the round starts and is picked as
     -- traitor, but for whatever reason does not get the traitor state msg. So
     -- re-send after a second just to make sure everyone is getting it.
@@ -1275,7 +1273,6 @@ function BeginRound()
 
     -- Sound start alarm
     SetRoundState(ROUND_ACTIVE)
-    LANG.Msg("round_started")
     ServerLog("Round proper has begun...\n")
 
     events.Trigger(EVENT_SELECTED)

lua/terrortown/lang/en.lua

@@ -26,9 +26,6 @@ L.traitors = "Team Traitor"
 L.round_minplayers = "Not enough players to start a new round..."
 L.round_voting = "Vote in progress, delaying new round by {num} seconds..."
 L.round_begintime = "A new round begins in {num} seconds. Prepare yourself."
-L.round_selected = "The Traitors have been selected."
-L.round_started = "The round has begun!"
-L.round_restart = "The round has been forced to restart by an admin."
 
 L.round_traitors_one = "Traitor, you stand alone."
 L.round_traitors_more = "Traitor, these are your allies: {names}"