Searching for Web Maps utilizing a specific feature layer

[BrianKlapstein]

Hi, I recently became administrator for my organization's existing ArcGIS Online and have run into a roadblock.  I have two feature layers that are redundant but before I remove one, I want to know what existing web maps (or other services) are out there that are using each of the feature layers.  How can I perform such a search?

[RebeccaStrauch__GISP]

I would start with the various admin tools

Tools · Esri/ago-admin-wiki Wiki · GitHub 

I also recall there was a similar post in the last month or two, so you might find a similar post here on geonet.