Representations allow you to build complex symbols and add dynamic effects to meet your organization’s cartographic specifications. During the process of building these you may end up creating multiple representations. By using the recently released Drop All Representations tool you are able to remove all representation classes from any number of feature layers. Essentially, allowing you to “reset” your feature layer symbology to a clean slate.
You can use the tool as-is or further customize it to meet your own purposes. You will need ArcGIS 10.1 for Desktop – Standard or Advanced to run this tool.
NOTE: Representations are permanently deleted from the selected feature class(es). It is highly recommended you create a backup of your workspace before running this tool.