diff --git a/src/utils/assist.js b/src/utils/assist.js
index 7a28064..38ecc23 100644
--- a/src/utils/assist.js
+++ b/src/utils/assist.js
@@ -324,15 +324,3 @@ export function setMatchMedia () {
         window.matchMedia = window.matchMedia || matchMediaPolyfill;
     }
 }
-
-export function getCommonString (arr1, arr2) {
-    const len1 = arr1.length;
-    const len2 = arr2.length;
-    let i = -1;
-    const len = Math.min(len1, len2);
-    let res = [];
-    while (++i < len) {
-        if (arr1.indexOf(arr2[i]) >= 0) res.push(arr2[i]);
-    }
-    return res;
-}
--
libgit2 0.21.4