Remove unused class

src/main/kotlin/ru/dbotthepony/mc/otm/container/MatteryContainer.kt

@@ -81,30 +81,6 @@ open class MatteryContainer(var listener: ContainerListener, private val size: I
 	var changeset = 0
 		private set
 
-	inner class Cache<T>(private val supplier: (MatteryContainer) -> T) : Supplier<T> {
-		private var thisChangeset = -1
-		private var value: T? = null
-		private var isDisabled = false
-
-		fun disable() {
-			isDisabled = true
-		}
-
-		fun enable() {
-			isDisabled = false
-		}
-
-		override fun get(): T {
-			if (thisChangeset == changeset && !isDisabled) {
-				return value as T
-			}
-
-			value = supplier.invoke(this@MatteryContainer)
-			thisChangeset = changeset
-			return value as T
-		}
-	}
-
 	fun clearSlotFilters() {
 		Arrays.fill(filters, null)
 	}