Looks like the city is spoiling for a new fight with restaurateurs: A bill being introduced today by Brooklyn city council member Inez Barron would force them to warn customers that foods with too much sugar and carbs are dangerous to people with diabetes. If it’s passed, restaurants would be required to hang a poster created by the Department of Health that spells out the “risks of excessive sugar and other carbohydrate intake for diabetic and pre-diabetic individuals.” Barron says the city has “an obligation” to provide consumers with this information just like it has with calorie counts. …