Revert "Add defined? keyword support for x-strings"
Revert "Add defined? keyword support for x-strings"

This reverts commit c2bd35e8a8f561625d67e3c15e1cd9dc74152796.

Ajedi32/opal,suyesh/opal,Flikofbluelight747/opal,jgaskins/opal,castwide/opal,Flikofbluelight747/opal,wied03/opal,kachick/opal,suyesh/opal,Mogztter/opal,merongivian/opal,merongivian/opal,catprintlabs/opal,fazibear/opal,Mogztter/opal,castwide/opal,c42engineering/opal,gausie/opal,iliabylich/opal,domgetter/opal,gausie/opal,jgaskins/opal,opal/opal,fazibear/opal,suyesh/opal,wied03/opal,opal/opal,charliesome/opal,charliesome/opal,iliabylich/opal,gabrielrios/opal,bbatsov/opal,Ajedi32/opal,opal/opal,Mogztter/opal,iliabylich/opal,gabrielrios/opal,domgetter/opal,opal/opal,catprintlabs/opal,Mogztter/opal,gabrielrios/opal,Ajedi32/opal,kachick/opal,merongivian/opal,bbatsov/opal,wied03/opal,jannishuebl/opal,catprintlabs/opal,fazibear/opal,jannishuebl/opal,kachick/opal,c42engineering/opal,castwide/opal,jannishuebl/opal,Flikofbluelight747/opal,kachick/opal,bbatsov/opal,jgaskins/opal,c42engineering/opal,gausie/opal