Do not add new music styles to old park automatically

distribution/changelog.txt

@@ -30,6 +30,7 @@
 - Improved: [objects#329] Add RCT1AA lay-down coaster trains (for import only).
 - Change: [#7248] Small mini-maps are now centred in the map window.
 - Change: [#20240] Heavy snow and blizzards now make guests buy and use umbrellas.
+- Change: [#21043] The new music styles are no longer added to old parks automatically.
 - Change: [#21214] Wacky Worlds and Time Twister’s scenario names now match their park names.
 - Change: [#21991] UI themes JSON now use colour names and a translucency bool, instead of a number (old themes still work).
 - Change: [#22057] Reorder Time Twister’s scenarios and adjust their difficulty classification.

src/openrct2/rct12/RCT12.cpp

@@ -760,16 +760,6 @@ static constexpr std::string_view _musicStyles[] = {
     "rct2.music.pirate",
     "rct2.music.rock3",
     "rct2.music.candy",
-    "openrct2.music.galaxy",
-    "openrct2.music.acid",
-    "openrct2.music.dodgems",
-    "openrct2.music.blizzard",
-    "openrct2.music.extraterrestrial",
-    "openrct2.music.fairground2",
-    "openrct2.music.ragtime2",
-    "openrct2.music.prehistoric",
-    "openrct2.music.mystic",
-    "openrct2.music.rock4",
 };
 
 std::string_view GetStationIdentifierFromStyle(uint8_t style)