build(): remove unused dependencies

- Remove country_picker, language_picker, recase, and universal_io packages
- These dependencies were no longer in use and have been purged from both pubspec.yaml and pubspec.lock

Author: fulleni

pubspec.lock

@@ -94,14 +94,6 @@ packages:
       url: "https://github.com/flutter-news-app-full-source-code/core.git"
     source: git
     version: "0.0.0"
-  country_picker:
-    dependency: "direct main"
-    description:
-      name: country_picker
-      sha256: "9b14c04f9a35e99f6de6bcbc453a556bb98345aecb481c7a0e843c94c2bee1f8"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.0.27"
   crypto:
     dependency: transitive
     description:
@@ -348,14 +340,6 @@ packages:
       url: "https://github.com/flutter-news-app-full-source-code/kv-storage-shared-preferences.git"
     source: git
     version: "0.0.0"
-  language_picker:
-    dependency: "direct main"
-    description:
-      name: language_picker
-      sha256: cace0eab53b712e26f5d2cd834a050b6dd6ab56b2ba31b3000dbe5f89f33f5fd
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.4.5"
   logging:
     dependency: "direct main"
     description:
@@ -476,14 +460,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.1.5"
-  recase:
-    dependency: transitive
-    description:
-      name: recase
-      sha256: e4eb4ec2dcdee52dcf99cb4ceabaffc631d7424ee55e56f280bc039737f89213
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.1.0"
   shared_preferences:
     dependency: transitive
     description:
@@ -610,14 +586,6 @@ packages:
       url: "https://github.com/flutter-news-app-full-source-code/ui-kit.git"
     source: git
     version: "0.0.0"
-  universal_io:
-    dependency: transitive
-    description:
-      name: universal_io
-      sha256: "1722b2dcc462b4b2f3ee7d188dad008b6eb4c40bbd03a3de451d82c78bba9aad"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.2.2"
   universal_platform:
     dependency: transitive
     description:

pubspec.yaml

@@ -24,7 +24,6 @@ dependencies:
   core:
     git:
       url: https://github.com/flutter-news-app-full-source-code/core.git
-  country_picker: ^2.0.27
   data_api:
     git:
       url: https://github.com/flutter-news-app-full-source-code/data-api.git
@@ -59,7 +58,6 @@ dependencies:
   kv_storage_shared_preferences:
     git:
       url: https://github.com/flutter-news-app-full-source-code/kv-storage-shared-preferences.git
-  language_picker: ^0.4.5
   logging: ^1.3.0
   pinput: ^5.0.1
   timeago: ^3.7.1