Please note that it's helpful to wrap inputs and outputs in code tags, in addition to code itself. Whitespace gets mangled and pairs of square brackets linkify content.
Given that it looks like you are dealing with JSON, using the JSON module is probably the clean solution. You can parse the JSON, delete the offending keys, and then reserialize. It's not clear to me how one identifies the offending elements -- can you characterize the traits of the objects you wish to remove?
#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.