Complete removal of /info entity, it's correspondent carpet and two small changes (#1047)

* Remove no longer needed language packet mixin

* Make StringArgument properly return a StringArgument supplier, so `string` isn't `term`

Fixes gnembon/fabric-carpet#1044

* Complete removal of `/info entity` and it's correspondent carpet

Resolves gnembon/fabric-carpet#1033

* Remove yet another no longer needed mixin

src/main/resources/carpet.mixins.json

@@ -70,7 +70,6 @@
     "Memory_scarpetMixin",
 
     "PlayerEntity_fakePlayersMixin",
-    "ServerWorld_fakePlayersMixin",
     "ThrownEnderpearlEntity_fakePlayersMixin",
 
     "ServerPlayNetworkHandler_coreMixin",
@@ -81,7 +80,6 @@
     "ExperienceOrbEntityMixin",
     "PlayerActionC2SPacketMixin",
     "ServerPlayerEntityMixin",
-    "ClientSettingsC2SPacket_scarpetMixin",
     "PlayerManager_coreMixin",
     "PlayerManager_fakePlayersMixin",
     "RedstoneWireBlockMixin",