chore: remove sora_client_enabled residuals from frontend types and store

frontend/src/stores/app.ts

@@ -338,7 +338,6 @@ export const useAppStore = defineStore('app', () => {
         linuxdo_oauth_enabled: false,
         oidc_oauth_enabled: false,
         oidc_oauth_provider_name: 'OIDC',
-        sora_client_enabled: false,
         backend_mode_enabled: false,
         version: siteVersion.value
       }

frontend/src/types/index.ts

@@ -112,7 +112,6 @@ export interface PublicSettings {
   linuxdo_oauth_enabled: boolean
   oidc_oauth_enabled: boolean
   oidc_oauth_provider_name: string
-  sora_client_enabled: boolean
   backend_mode_enabled: boolean
   version: string
 }