chore: clean repo for CV sharing

- Remove hardcoded Gitea token, use BuildConfig instead

- Remove unnecessary CHANGELOG.md

app/src/main/java/com/iptv/app/data/remote/UpdateService.kt

@@ -25,8 +25,8 @@ class UpdateService(context: Context) {
         private const val REPO_OWNER = "renato97"
         private const val REPO_NAME = "iptv-app"
 
-        // Token de Gitea para acceder a releases privados
-        private const val GITEA_TOKEN = "efeed2af00597883adb04da70bd6a7c2993ae92d"
+        // Token de Gitea para acceder a releases - obtenido de BuildConfig
+        private val GITEA_TOKEN: String = BuildConfig.GITEA_TOKEN
 
         // Endpoints
         private const val LATEST_RELEASE_ENDPOINT = "$GITEA_API_URL/repos/$REPO_OWNER/$REPO_NAME/releases/latest"