Of course the feasts that were removed were the ones strictly for the nation of Israel under the Law Covenant. That law was fulfilled with Christ, and so Christians are under no obligation to keep those feasts.
Emperor Constantine, Emperor of the Roman Empire He had issued an Edict making Sunday the day of rest In 321 CE, while a Pagan sun-worshiper, the Emperor Constantine
They ruled: "Christians shall not Judaize and be idle on Saturday, but shall work on that day."
This is the Decree from the first Pontiff of the Roman church to all the world.
shalom b'SHEM Yah'shua HaMashiach Adonai
declared that Sunday was to be a day of rest throughout the Roman Empire: "On the venerable day of the Sun let the magistrates and people residing in cities rest,
Council of Laodicea circa 364 CE ordered that religious observances were
and let all workshops be closed. In the country however persons engaged in agriculture
may freely and lawfully continue their pursuits because it often happens that another day
is not suitable for gain-sowing or vine planting; lest by neglecting the proper moment
for such operations the bounty of heaven should be lost."
to be conducted on Sunday, not Saturday. Sunday became the new Sabbath.