Remove more dead code

src/util/generateModules.js

@@ -1,20 +0,0 @@
-import _ from 'lodash'
-import postcss from 'postcss'
-import wrapWithVariants from '../util/wrapWithVariants'
-
-export default function(modules, moduleOptions, generatorOptions = {}) {
-  modules.forEach(module => {
-    if (!_.has(moduleOptions, module.name)) {
-      throw new Error(`Module \`${module.name}\` is missing from moduleOptions.`)
-    }
-  })
-
-  return postcss.root({
-    nodes: _(modules)
-      .reject(module => moduleOptions[module.name] === false)
-      .flatMap(module =>
-        wrapWithVariants(module.generator(generatorOptions), moduleOptions[module.name])
-      )
-      .value(),
-  })
-}