refactor: remove CUSTOMER_KEY_CHECK from whitelist

Author: wlgns12370

src/main/java/life/mosu/mosuserver/global/filter/Whitelist.java

@@ -44,7 +44,6 @@ public enum Whitelist {
     USER_ID_CHECK("/api/v1/user/check-id", WhitelistMethod.GET),
     USER_PHONE_NUMBER_CHECK("/api/v1/user/check-phone-number", WhitelistMethod.GET),
 
-    CUSTOMER_KEY_CHECK("/api/v1/user/customer-key", WhitelistMethod.GET),
     EXAM("/api/v1/exam", WhitelistMethod.GET),
     EXAM_AREAS("/api/v1/exam/areas", WhitelistMethod.GET),
     EXAM_ALL("/api/v1/exam/all", WhitelistMethod.GET),