Always read local receipt in TestFlight (#826)

The condition came from v2, but the flow was different. Drop the
condition because it would always fail in TestFlight for macOS, where
sandbox and release receipts have the same URL.

Passepartout/Library/Sources/CommonLibrary/IAP/FallbackReceiptReader.swift

@@ -72,12 +72,6 @@ private extension FallbackReceiptReader {
                 .deletingLastPathComponent()
                 .appendingPathComponent("receipt")
 
-            guard releaseURL != localURL else {
-#if !os(macOS) && !targetEnvironment(simulator)
-                assertionFailure("How can release URL be equal to Sandbox URL in TestFlight?")
-#endif
-                return nil
-            }
             let release = localReader(releaseURL)
             return await release?.receipt()
         }()