clean up ActiveWorkoutSession

WorkoutsPlus/Features/Workout/WorkoutItem.swift

@@ -45,8 +45,9 @@ final class WorkoutItem: Nameable, Positionable {
 		var exercise: Exercise  	   //	Do Push-up 	| Run Marathon
 		var plannedReps: Int								// 8 times 				| 1 time
 		var plannedValue: Double				// With 10 				| 42,187
-		var unit: ExerciseUnit
-		var metric: ExerciseMetric? // kg (weight) | km (distance)
+		
+		var unit: ExerciseUnit?
+		var type: ExerciseType?
 		
 		enum WorkoutItemType: Codable {
 				case exercise
@@ -64,8 +65,6 @@ final class WorkoutItem: Nameable, Positionable {
 				self.plannedReps = 1
 				// 0
 				self.plannedValue = 0
-				// kg
-				self.unit = exercise.unit
 		}
 		
 		//		init(set: [WorkoutItem] = []) {