I guess it doesn’t matter if he resigned or was asked to leave…..
“White House counselor Kellyanne Conway told NBC’s “Today” show that Flynn “knew he’d become a lightning rod” and made the decision to resign.”
“House Speaker Paul Ryan said Trump made the right decision in asking Flynn to step down.”
.
But this does matter……
“White House press secretary Sean Spicer said Mr. Trump was informed 17 days ago by White House Counsel Donald McGahn that his national security adviser had not been truthful when he told Vice President Mike Pence that he had not discussed sanctions with the Russian ambassador.”
https://www.nytimes.com/2017/02/14/us/politics/donald-trump-administration-michael-flynn-resignation.html

“Flynn was part of Trump’s daily briefing Monday and sat in on his calls with foreign leaders…”

Why was Flynn still sitting in on daily briefings and calls with foreign leaders 2 weeks after Trump knew about his lies?