chore: remove unnecessary type annotation

Author: jlsuh

src/utils/replaceWhiteSpace.ts

@@ -1,6 +1,3 @@
-export const replaceWhiteSpace = (
-  str: string,
-  replacement: string = "-",
-): string => {
+export const replaceWhiteSpace = (str: string, replacement: string = "-") => {
   return str.replace(/\s+/g, replacement).toLowerCase();
 };