satisfy unused variable linter

server/GameServer/AbstractCtx.lean

@@ -18,7 +18,7 @@ def abstractCtx (goal : MVarId) : MetaM AbstractCtxResult := do
   }
 
 def openAbstractCtxResult (res : AbstractCtxResult) (k : Array Expr → Expr → MetaM α) : MetaM α := do
-  let (mvars, binderInfo, expr) ← openAbstractMVarsResult res.abstractMVarsResult
+  let (_mvars, _binderInfo, expr) ← openAbstractMVarsResult res.abstractMVarsResult
   lambdaLetTelescope (← instantiateMVars expr) k
   -- TODO: Unfornately, lambdaLetTelescope does not allow us to provide the number of arguments.
   -- If the goal is a function, this will not work.

server/GameServer/EnvExtensions.lean

@@ -303,7 +303,7 @@ new.fold (fun acc a b =>
   then acc.insert a (merge bOld b)
   else acc.insert a b) old
 
-def GameLevel.merge (old : GameLevel) (new : GameLevel) : GameLevel :=
+def GameLevel.merge (_old : GameLevel) (new : GameLevel) : GameLevel :=
   new -- simply override old level
 
 def World.merge (old : World) (new : World) : World :=