Remove no-longer-needed Sendable workaround

Author: gwynne

Sources/FluentPostgresDriver/FluentPostgresConfiguration.swift

@@ -82,9 +82,7 @@ extension DatabaseConfigurationFactory {
         decodingContext: PostgresDecodingContext<some PostgresJSONDecoder>,
         sqlLogLevel: Logger.Level = .debug
     ) -> DatabaseConfigurationFactory {
-        let configuration = FakeSendable(wrappedValue: configuration)
-
-        return .init {
+        .init {
             FluentPostgresConfiguration(
                 configuration: configuration,
                 maxConnectionsPerEventLoop: maxConnectionsPerEventLoop,
@@ -97,8 +95,6 @@ extension DatabaseConfigurationFactory {
     }
 }
 
-private struct FakeSendable<T>: @unchecked Sendable { let wrappedValue: T }
-
 /// We'd like to just default the context parameters of the "actual" method. Unfortunately, there are a few
 /// cases involving the UNIX domain socket initalizer where usage can resolve to either the new
 /// `SQLPostgresConfiguration`-based method or the deprecated `PostgresConfiguration`-based method, with no
@@ -172,15 +168,15 @@ extension DatabaseConfigurationFactory {
 /// The actual concrete configuration type produced by a configuration factory.
 struct FluentPostgresConfiguration<E: PostgresJSONEncoder, D: PostgresJSONDecoder>: DatabaseConfiguration {
     var middleware: [any AnyModelMiddleware] = []
-    fileprivate let configuration: FakeSendable<SQLPostgresConfiguration>
+    fileprivate let configuration: SQLPostgresConfiguration
     let maxConnectionsPerEventLoop: Int
     let connectionPoolTimeout: TimeAmount
     let encodingContext: PostgresEncodingContext<E>
     let decodingContext: PostgresDecodingContext<D>
     let sqlLogLevel: Logger.Level
 
     func makeDriver(for databases: Databases) -> any DatabaseDriver {
-        let connectionSource = PostgresConnectionSource(sqlConfiguration: self.configuration.wrappedValue)
+        let connectionSource = PostgresConnectionSource(sqlConfiguration: self.configuration)
         let elgPool = EventLoopGroupConnectionPool(
             source: connectionSource,
             maxConnectionsPerEventLoop: self.maxConnectionsPerEventLoop,