Update repositories.yaml with new FOG metrics_yamls list (#952)

Author: github-actions[bot]

repositories.yaml

@@ -843,7 +843,6 @@ applications:
       - firefox-ios/Client/Glean/probes/library.reading_list_panel.yaml
       - firefox-ios/Client/Glean/probes/metrics.yaml
       - firefox-ios/Client/Glean/probes/microsurvey.yaml
-      - firefox-ios/Client/Glean/probes/reader_mode.yaml
       - firefox-ios/Client/Glean/probes/settings.yaml
       - firefox-ios/Client/Glean/probes/share_sheet.yaml
       - firefox-ios/Client/Glean/probes/tabs_panel.yaml