Fixed issue #11- "[L10N][Japanese]: Overlocalized Edge Inspect extension on Japanese OS"

Fixed issue #11- "[L10N][Japanese]: Overlocalized Edge Inspect extension on Japanese OS"

removed Japanese language entry from master strings index.  left the actual Japanese translations under `nls/ja`, so in the future, when we actually want Japanese strings in this extension, we just need to re-add this entry into `nls/strings.js`