diff --git a/src/generators/constrain.js b/src/generators/constrain.js
deleted file mode 100644
index 4e9b2650f..000000000
--- a/src/generators/constrain.js
+++ /dev/null
@@ -1,10 +0,0 @@
-import _ from 'lodash'
-import defineClass from '../util/defineClass'
-
-export default function ({ constrain }) {
-  return _.map(constrain, (size, className) => {
-    return defineClass(`constrain-${className}`, {
-      'max-width': size,
-    })
-  })
-}