feat(pack): make Distant Horizons mandatory for all clients

DH was optional (default on), which still lets launchers/exporters skip
it and left the server's LOD data unused. Drop the [option] block so it
is required and installed for every client.

mods/distanthorizons.pw.toml

@@ -2,11 +2,6 @@ name = "Distant Horizons"
 filename = "DistantHorizons-3.3.2-1.21.1-fabric-neoforge.jar"
 side = "both"
 
-[option]
-optional = true
-default = true
-description = "Extended render distance via level-of-detail terrain (heavy on GPU/VRAM)"
-
 [download]
 url = "https://cdn.modrinth.com/data/uCdwusMi/versions/Ez3cx7Yd/DistantHorizons-3.3.2-1.21.1-fabric-neoforge.jar"
 hash-format = "sha512"