All general ordinances of the city are hereby repealed, except as herein specifically preserved or are, by implication, reserved from repeal, subject to the saving clauses herein contained, excluding without limitation the special ordinances relating to the following subjects: Tax levies; appropriation of public moneys; boundaries and annexations; franchises; ordinances granting special rights to persons or correspondence; contracts; issuance of warrants; public salaries; ordinances establishing names or vacating streets, alleys or other public places; improvement districts; bonds; local elections; the sale or exchange of real estate; sign ordinances; economic development; urban renewal; public utilities; zoning; and all special ordinances of any kind, except for those provisions in such special ordinances which the code expressly amends.