Remove null fields form LSP response (#15329)
Remove null fields form LSP response (#15329)

* Remove null fields form LSP response

* Addressing comments

* Add unicode for 2.7 and address comments

* Cleanup comments

* Simplify how we check for unicode availability

* Address comments and add support for dicts

* Using filter instead of list comprehension
DonJayamanne/pythonVSCode,DonJayamanne/pythonVSCode,DonJayamanne/pythonVSCode,DonJayamanne/pythonVSCode,DonJayamanne/pythonVSCode