chore: remove environment check because of duplication on the warn method

Author: yinm

src/util/params.js

@@ -24,10 +24,8 @@ export function fillParams (
 
     return filler(params, { pretty: true })
   } catch (e) {
-    if (process.env.NODE_ENV !== 'production') {
-      // Fix #3072 no warn if `pathMatch` is string
-      warn(typeof params.pathMatch === 'string', `missing param for ${routeMsg}: ${e.message}`)
-    }
+    // Fix #3072 no warn if `pathMatch` is string
+    warn(typeof params.pathMatch === 'string', `missing param for ${routeMsg}: ${e.message}`)
     return ''
   } finally {
     // delete the 0 if it was added