diff --git a/index.js b/index.js
index 8cefa05..795b3c4 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,3 @@
-const core = require('@actions/core')
 const { Toolkit } = require('actions-toolkit')
 const { execSync } = require('child_process')
 
@@ -25,8 +24,6 @@ Toolkit.run(async tools => {
     version = 'minor'
   }
 
-  const tagPrefix = core.getInput('tag-prefix')
-
   try {
     const current = pkg.version.toString()
     // set git user