Aperture: Remove unnecessary countDownView.isVisible writes

CountDownView already handles that internally.

Change-Id: I21602aae628a3abfdee30fd4d7fa8bc03fa3275c
diff --git a/app/src/main/java/org/lineageos/aperture/MainActivity.kt b/app/src/main/java/org/lineageos/aperture/MainActivity.kt
index f1487fc..2c3bf35 100644
--- a/app/src/main/java/org/lineageos/aperture/MainActivity.kt
+++ b/app/src/main/java/org/lineageos/aperture/MainActivity.kt
@@ -1251,14 +1251,12 @@
         }
 
         countDownView.setCountDownStatusListener {
-            countDownView.isVisible = false
             shutterButton.isEnabled = true
 
             runnable()
         }
 
         shutterButton.isEnabled = false
-        countDownView.isVisible = true
 
         val rect = Rect().apply {
             viewFinder.getGlobalVisibleRect(this)