The plaintiffs in the Occupy Boston lawsuit against the city filed a voluntary dismissal yesterday, ending their quest for permission to reside on Dewey Square. The lawsuit was an attempt to keep protesters from being evicted from the camp by police. Two weeks ago, a Suffolk Superior Court judge ruled that the group did not have a First Amendment right to live in the public park. The next day, Mayor Thomas M. Menino issued an eviction notice to protesters. Less than two days later, police conducted a raid, razed the tent city, and arrested 46 Occupy Boston supporters.