diff --git a/src/utils/index.ts b/src/utils/index.ts
deleted file mode 100644
index e6a26b2..0000000
--- a/src/utils/index.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { BoxKnownProps } from 'types'
-
-// const dsProps = [...systemProps, 'sx', 'variant']
-// const PRE = new RegExp(`^(${dsProps.join('|')})$`)
-
-const MRE = /^m[trblxy]?$/
-
-const getProps =
-  (test: (a: string) => boolean) => (props: { [key: string]: any }) => {
-    const next: { [key: string]: any } = {}
-    Object.keys(props).forEach((key) => {
-      if (test(key || '')) next[key] = props[key]
-    })
-    return next as BoxKnownProps
-  }
-
-export const getMarginProps = getProps((k) => MRE.test(k))
-export const omitMarginProps = getProps((k) => !MRE.test(k))