refactor: powered_by_header kemal config

app/config/kemal.cr

@@ -3,3 +3,5 @@ require "kemal"
 Kemal.config.env = ENV["ENV"]? || "development"
 Kemal.config.port = ENV["PORT"]?.try(&.to_i) || 4000
 Kemal.config.host_binding = ENV["HOST"]? || "0.0.0.0"
+
+Kemal.config.powered_by_header = false

app/routes.cr

@@ -5,7 +5,6 @@ module App
     env.response.headers["Access-Control-Allow-Origin"] = "*"
     env.response.headers["Access-Control-Allow-Methods"] = "GET, POST, PUT, DELETE, OPTIONS"
     env.response.headers["Access-Control-Allow-Headers"] = "Content-Type, Accept, Origin, X-Api-Key"
-    env.response.headers.delete("X-Powered-By")
   end
 
   after_all do |env|