§ 80. Discrimination against non-residents. Any restriction or regulation imposed by the governing board of a municipal corporation upon the inhabitants of any other municipal corporation within this state, carrying on or desiring to carry on any lawful business or calling within the limits thereof, which shall not be necessary for the proper regulation of such trade, business or calling, and shall not apply to citizens of all parts of the state alike, except ordinances or regulations in reference to traveling circuses, shows and exhibitions, shall be void.