Revert "Refine Humanoid.Seated (#1306)"

This reverts commit 32360a5.

include/customDefinitions.d.ts

@@ -511,11 +511,7 @@ interface HttpService extends Instance {
 
 interface Humanoid extends Instance {
 	readonly AnimationPlayed: RBXScriptSignal<(animationTrack: AnimationTrack) => void>;
-	readonly Seated: RBXScriptSignal<
-		(
-			...args: [active: true, currentSeatPart: Seat | VehicleSeat] | [active: false, currentSeatPart: undefined]
-		) => void
-	>;
+	readonly Seated: RBXScriptSignal<(active: boolean, currentSeatPart: Seat | VehicleSeat | undefined) => void>;
 	readonly Touched: RBXScriptSignal<(touchingPart: BasePart, humanoidPart: BasePart) => void>;
 	GetAppliedDescription(this: Humanoid): HumanoidDescription;
 	GetPlayingAnimationTracks(this: Humanoid): Array<AnimationTrack>;