revert this, handled better in julianna-langston#727

Author: cmcnulty

src/translator.ts

@@ -78,12 +78,6 @@ export class TranslationManager {
             code,
             createIntl({
                 locale: code,
-                onError: (...args) => {
-                    // Suppress missing translation errors
-                    if ((args[0].code as string) === "MISSING_DATA") {
-                        return;
-                    }
-                },
                 // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
                 messages: translations[code]
             })