docs: remove debug argument from flow/typescript definitions

Author: gr2m

scripts/templates/index.d.ts.tpl

@@ -13,7 +13,6 @@ declare namespace Github {
   }
 
   export interface Options {
-    debug?: boolean;
     timeout?: number;
     host?: string;
     pathPrefix?: string;

scripts/templates/index.js.flow.tpl

@@ -9,7 +9,6 @@ declare module "github" {
   };
 
   declare type Options = {
-    debug?: boolean;
     timeout?: number;
     host?: string;
     pathPrefix?: string;