Remove docs for deprecated params in PackageDescription API

Author: ElektrojungeAtWork

Sources/PackageDescription4/Package.swift

@@ -245,8 +245,6 @@ public final class Package {
     ///
     /// - Parameters:
     ///     - name: The name of the Swift package.
-    ///     - pkgConfig: Additional flags for a system package.
-    ///     - providers: The package providers for a system package.
     ///     - products: The list of products that this package vends and that can be run or used by its clients.
     ///     - dependencies: The list of package dependencies.
     ///     - targets: The list of targets that are part of this package.
@@ -282,8 +280,6 @@ public final class Package {
     /// - Parameters:
     ///     - name: The name of the Swift package.
     ///     - platforms: The list of minimum deployment targets per platform.
-    ///     - pkgConfig: Additional flags for a system package.
-    ///     - providers: The package providers for a system package.
     ///     - products: The list of products that this package vends and that can be run or used by its clients.
     ///     - dependencies: The list of package dependencies.
     ///     - targets: The list of targets that are part of this package.