Cleanup duplicated names from contributors list.

* ref 1a7a9619d8

(cherry picked from commit e142c3b873)

THANKS

@@ -439,7 +439,6 @@ were extracted from old commits):
 - jorooo
 - joschiwald
 - Joshh
-- Joshiwald
 - joshwhedon
 - jotapdiez
 - jrkpote
@@ -614,7 +613,6 @@ were extracted from old commits):
 - Necroo
 - Nefarion
 - nelegalno
-- nelgalno
 - Nemesis
 - neo0608
 - Neo2003
@@ -684,7 +682,6 @@ were extracted from old commits):
 - pjasicek
 - PKX
 - Polkic
-- Portgas
 - Portgas D. Ace
 - Praetonus
 - Prince
@@ -862,7 +859,6 @@ were extracted from old commits):
 - Tomatoes
 - Tome
 - Tommassino
-- tomrus88
 - TOM_RUS
 - toshik
 - totoro
@@ -875,7 +871,6 @@ were extracted from old commits):
 - Trista
 - Trogvar
 - Trojan
-- Trond B Krokli
 - Troy
 - TrullyONE
 - Turk3y
@@ -962,7 +957,6 @@ were extracted from old commits):
 - yesitsme
 - z0ldrax
 - Zabustak
-- ZackTsuna
 - Zakamurite
 - Zaphod
 - Zcuron