update pdf viewer and remove CORS check

res/static/misc/pdf-viewer/web/locale/hi-IN/viewer.properties

@@ -208,6 +208,10 @@ invalid_file_error=अमान्य या भ्रष्ट PDF फ़ाइ
 missing_file_error=\u0020अनुपस्थित PDF फ़ाइल.
 unexpected_response_error=अप्रत्याशित सर्वर प्रतिक्रिया.
 
+# LOCALIZATION NOTE (annotation_date_string): "{{date}}" and "{{time}}" will be
+# replaced by the modification date, and time, of the annotation.
+annotation_date_string={{date}}, {{time}}
+
 # LOCALIZATION NOTE (text_annotation_type.alt): This is used as a tooltip.
 # "{{type}}" will be replaced with an annotation type from a list defined in
 # the PDF spec (32000-1:2008 Table 169 – Annotation types).