Deleting a symbol from a custom library
When you delete a symbol from a custom library, it is no longer available on the Symbols palette to use in new documents.
1.On the Utility menu, choose Edit Symbol Libraries.
2.On the right palette, display the library that contains the symbol.
▪On the Category menu, select the category that contains the library.
▪Click to browse the libraries in the category.
3.Drag the symbol to the Trash icon, then click OK.
Note: You can only delete symbols from custom symbol libraries.