Revert "Fixed ipv4 validation and creditCard validation"

This reverts commit 297ea8e2bd52882e6128ebdeea3e671081b03d96.
Revert "Added an isIP function to validate IPv4 and IPv6 types of ips. Added an isCreditCard function to validate credit card numbers against the specs of certain companies"

This reverts commit c191b529651faab799b75ccd0ce0859949cccf1b.