The director may remove or cause to be removed, any tree or part thereof which is in an unsafe condition or which by reason of its nature is injurious to sewers, electric power lines, gas lines, water lines, curbs, gutters, streets, utilities, or other public improvements, or is affected with any injurious fungus, insect, or other pest. The city shall not incur any financial obligation for the removal and/or replacement of street trees. (Ord. 2004-21 (part), 2004)