Remove extra options and regenerate from Swift's Options.td

Remove `ExtraOptions.swift` to avoid new options being added there and
not in the old driver, at least until all clients are moved off the old
driver completely.

Author: bnbarham

Sources/SwiftOptions/ExtraOptions.swift

@@ -13,7 +13,7 @@ public struct OptionTable {
   public init() { }
 
   /// Retrieve the options.
-  public var options: [Option] = Option.allOptions + Option.extraOptions
+  public var options: [Option] = Option.allOptions
   public lazy var groupMap: [Option.Group: [Option]] = {
     var map = [Option.Group: [Option]]()
     for opt in options {