Revert "change circle radius percentage calculation"

This reverts commit 99ab08db25.

lib/percentToFloat.js

@@ -1,10 +1,5 @@
 let percentReg = /^(\-?\d+(?:\.\d+)?)(%?)$/;
 export default function (percent) {
     let matched = percent.match(percentReg);
-    if (!matched) {
-        console.warn(`\`${percent}\` is not a valid number or percentage string.`);
-        return 0;
-    }
-
     return matched[2] ? matched[1] / 100 : +matched[1];
 }