removing pattern from lines in a file using sed or awk - awk

Question

I am trying to remove a pattern from all lines in a file. The pattern is 'id': null and the two sed attempts I have made execute but the file is unchanged.. Thank you :).
file
{
"objects": [
{
"version": "1a",
"chromosome": "chr1",
"id": null,
"peptide": "123",
},
{
"version": "1a",
"chromosome": "chr1",
"id": "This line has text and is printed.",
"peptide": null,
},
{
"version": '1a',
"chromosome": "chr17",
"id": null,
"peptide": null},
"id": 'This has text in it and this line is printed as well',
"end": 460
}
]
}
desired
{
"objects": [
{
"version": "1a",
"chromosome": "chr1",
"peptide": "123",
},
{
"version": "1a",
"chromosome": "chr1",
"id": "This line has text and is printed.",
"peptide": null,
},
{
"version": '1a',
"chrmosome": "chr17",
"id": null,
"peptide": null},
"id": 'This has text in it and this line is printed as well',
"end": 460
}
]
}
sed
sed '/"id": *null/s/, [^,]*/ /' file --- if "id": null found substitute with blank up to the ending ,
sed -E "s/"id": *null, *//" file

Answer 1

You may use this gnu-sed:
sed 0,'/"id": null,/{//d}' file
This will remove first instance of "id": null, from file
Original answer based on original question:
sed -E "s/'id': *None, *//" file
{'version': '1a', 'chr': '17', 'xref_json': None}, 'id': 'This has text in it and this line is printed', 'end': 460}
{'version': '1a', 'chr': '17', 'xref_json': None}
s/'id': *None, *// searches for pattern 'id':<0 or more spaces>None,<0 or more spaces> and replaces that with empty string.