[core] Eliminate setProperty & co.

scripts/generate-style-code.js

@@ -192,9 +192,6 @@ for (const layer of layers) {
   writeIfModified(`src/mbgl/style/layers/${layerFileName}_layer_properties.cpp`, propertiesCpp(layer));
 }
 
-const propertySettersHpp = ejs.compile(fs.readFileSync('src/mbgl/style/conversion/make_property_setters.hpp.ejs', 'utf8'), {strict: true});
-writeIfModified('src/mbgl/style/conversion/make_property_setters.hpp', propertySettersHpp({layers: layers}));
-
 // Light
 const lightProperties = Object.keys(spec[`light`]).reduce((memo, name) => {
   var property = spec[`light`][name];