diff --git a/src/lib/keys.js b/src/lib/keys.js
index <HASH>..<HASH> 100644
--- a/src/lib/keys.js
+++ b/src/lib/keys.js
@@ -1,5 +1,3 @@
-import 'core-js/es/symbol';
-
 // TODO: Need better, more complete, and more methodical key definitions
 
 const Keys = {
Remove core-js import

`Symbol` is now part of ECMAScript and core-js is not included by default in babel 7 builds. 



By removing the explicit import, developers can use their own transpile process - if `Symbol` does not exist in their version of javascript, they'll get an error about that.