remove deprecated methods (#4)

motivation: no need in deprecated methods since we did not tag yet

changes: remove deprecated start and startAndWait methods

Author: tomerd

Sources/Lifecycle/Lifecycle.swift

@@ -37,17 +37,6 @@ public class Lifecycle {
         self.shutdownGroup.enter()
     }
 
-    /// Starts the provided `LifecycleItem` array and waits (blocking) until a shutdown `Signal` is captured or `Lifecycle.shutdown` is called on another thread.
-    /// Startup is performed in the order of items provided.
-    ///
-    /// - parameters:
-    ///    - shutdownSignal: Defines what, if any, signals to trap for invoking shutdown.
-    ///    - installBacktrace: Defines if to install a crash signal trap that prints backtraces.
-    @available(*, deprecated, message: "use startAndWait(configuration) instead")
-    public func startAndWait(shutdownSignal: [Signal]? = [.TERM, .INT], installBacktrace: Bool = true) throws {
-        try self.startAndWait(configuration: .init(shutdownSignal: shutdownSignal, installBacktrace: installBacktrace))
-    }
-
     /// Starts the provided `LifecycleItem` array and waits (blocking) until a shutdown `Signal` is captured or `Lifecycle.shutdown` is called on another thread.
     /// Startup is performed in the order of items provided.
     ///
@@ -66,18 +55,6 @@ public class Lifecycle {
         self.shutdownGroup.wait()
     }
 
-    /// Starts the provided `LifecycleItem` array.
-    /// Startup is performed in the order of items provided.
-    ///
-    /// - parameters:
-    ///    - shutdownSignal: Defines what, if any, signals to trap for invoking shutdown.
-    ///    - installBacktrace: Defines if to install a crash signal trap that prints backtraces.
-    ///    - callback: The handler which is called after the start operation completes. The parameter will be `nil` on success and contain the `Error` otherwise.
-    @available(*, deprecated, message: "use start(configuration) instead")
-    public func start(shutdownSignal: [Signal]? = [.TERM, .INT], installBacktrace: Bool = true, callback: @escaping (Error?) -> Void) {
-        self.start(configuration: .init(shutdownSignal: shutdownSignal, installBacktrace: installBacktrace), callback: callback)
-    }
-
     /// Starts the provided `LifecycleItem` array.
     /// Startup is performed in the order of items provided.
     ///