Upgrade: Drop the redundant safe call in the acquisition offers gate

Inside the '!inGrace ||' branch the compiler already smart-casts
loadedState to GplayUpgradeUiState.Loaded, so the '?.' on it was an
unnecessary safe call on a non-null receiver.

Author: d4rken

app/src/gplay/java/eu/darken/amply/upgrade/ui/UpgradeScreen.kt

@@ -157,7 +157,7 @@ private fun UpgradeAcquisitionContent(
 
     // During a YOUNG grace episode the offers box is hidden: likely a blip, and offers next to "still
     // active" would contradict it. An aged episode brings them back.
-    if (!inGrace || loadedState?.grace?.showDiagnostics == true) {
+    if (!inGrace || loadedState.grace?.showDiagnostics == true) {
         UpgradeOffersBox(
             uiState = uiState,
             onIap = onIap,