He never told. Who he gonna tell?    He’s referencing the
previous lines of Emory Jones. Emory nerver snitched the enitre
time he was in prison for what probably had Jay-Z’s hand it (a
big hand considering his wealth). Even while his son would live
out his entire young life with his father in prison, Emory stuck
to the G code.  As applied to his own life, Kanye followed the
no-snitching rule. Usually, when somebody “tells” they report to
a higher-up, but there is no one higher than his crew to tell.
He also was following from his last line in his reference to the
second-graders “telling” their teachers on other kids. He is
basically saying that principle of not snitching is something
that he carried with him that could potentially have been
instilled with him from his youth.  And referring to Jay’s
“clique,” “who we gonna tell” can also be interpreted as “who we
gonna tail.” The answer, of course, being no one, because Hov
and his clique stay ahead and on top, leading to the upcoming
totem pole reference.  J.