fix: some build & linter warnings

TelegramBotBase/Localizations/Default.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace TelegramBotBase.Localizations
+namespace TelegramBotBase.Localizations
 {
     public static class Default
     {

TelegramBotBase/Localizations/English.cs

@@ -1,12 +1,8 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace TelegramBotBase.Localizations
+namespace TelegramBotBase.Localizations
 {
     public class English : Localization
     {
-        public English() : base()
+        public English()
         {
             Values["Language"] = "English";
             Values["ButtonGrid_Title"] = "Menu";

TelegramBotBase/Localizations/German.cs

@@ -1,12 +1,8 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace TelegramBotBase.Localizations
+namespace TelegramBotBase.Localizations
 {
     public class German : Localization
     {
-        public German() : base()
+        public German()
         {
             Values["Language"] = "Deutsch (German)";
             Values["ButtonGrid_Title"] = "Menü";

TelegramBotBase/Localizations/Localization.cs

@@ -1,27 +1,12 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Collections.Generic;
 
 namespace TelegramBotBase.Localizations
 {
     public abstract class Localization
     {
-        public Dictionary<String, String> Values = new Dictionary<string, string>();
-
-        public String this[String key]
-        {
-            get
-            {
-                return Values[key];
-            }
-        }
-
-        public Localization()
-        {
-            
-            
-        }
+        public Dictionary<string, string> Values = new Dictionary<string, string>();
 
+        public string this[string key] => Values[key];
     }
 }