diff --git a/lib/util/generate-params-schema.js b/lib/util/generate-params-schema.js
index 8270d5ed..f0290686 100644
--- a/lib/util/generate-params-schema.js
+++ b/lib/util/generate-params-schema.js
@@ -4,10 +4,6 @@ const { matchParams } = require('./match-params')
 
 const namePattern = /\{([^}]+)\}/
 
-function paramType () {
-  return 'string'
-}
-
 function paramName (param) {
   return param.replace(namePattern, (_, captured) => captured)
 }