fix: disable PDF annotation button (#26004)

shell/browser/extensions/api/resources_private/resources_private_api.cc

@@ -66,9 +66,7 @@ void AddAdditionalDataForPdf(base::DictionaryValue* dict) {
   dict->SetKey("pdfFormSaveEnabled",
                base::Value(base::FeatureList::IsEnabled(
                    chrome_pdf::features::kSaveEditedPDFForm)));
-  dict->SetKey("pdfAnnotationsEnabled",
-               base::Value(base::FeatureList::IsEnabled(
-                   chrome_pdf::features::kPDFAnnotations)));
+  dict->SetKey("pdfAnnotationsEnabled", base::Value(false));
   dict->SetKey("printingEnabled", base::Value(true));
 #endif  // BUILDFLAG(ENABLE_PDF)
 }