better config handling

frontend/pshared/lib/config/common.dart

@@ -1,17 +1,15 @@
 import 'package:flutter/material.dart';
+
 import 'package:pshared/config/apply.dart';
 
+
 class CommonConstants {
   static String apiProto = 'https';
   static String apiHost = 'app.sendico.io';
   static String apiEndpoint = '/api/v1';
-  static String amplitudeSecret = 'c3d75b3e2520d708440acbb16b923e79';
-  static String amplitudeServerZone = 'EU';
-  static String posthogApiKey =
-      'phc_lVhbruaZpxiQxppHBJpL36ARnPlkqbCewv6cauoceTN';
+  static String posthogApiKey = 'phc_lVhbruaZpxiQxppHBJpL36ARnPlkqbCewv6cauoceTN';
   static String posthogHost = 'https://eu.i.posthog.com';
   static Locale defaultLocale = const Locale('en');
-  static String defaultCurrency = 'EUR';
   static int defaultDimensionLength = 500;
   static String clientId = '';
   static String wsProto = 'ws';
@@ -38,18 +36,12 @@ class CommonConstants {
       setApiHost: (value) => apiHost = value,
       currentApiEndpoint: apiEndpoint,
       setApiEndpoint: (value) => apiEndpoint = value,
-      currentAmplitudeSecret: amplitudeSecret,
-      setAmplitudeSecret: (value) => amplitudeSecret = value,
-      currentAmplitudeServerZone: amplitudeServerZone,
-      setAmplitudeServerZone: (value) => amplitudeServerZone = value,
       currentPosthogApiKey: posthogApiKey,
       setPosthogApiKey: (value) => posthogApiKey = value,
       currentPosthogHost: posthogHost,
       setPosthogHost: (value) => posthogHost = value,
       currentDefaultLocale: defaultLocale,
       setDefaultLocale: (value) => defaultLocale = value,
-      currentDefaultCurrency: defaultCurrency,
-      setDefaultCurrency: (value) => defaultCurrency = value,
       currentWsProto: wsProto,
       setWsProto: (value) => wsProto = value,
       currentWsEndpoint: wsEndpoint,