update sponsors

SPONSORS.md

@@ -20,23 +20,19 @@ Soluto ([@SolutoEng](https://twitter.com/SolutoEng))
 Steinar	Noem  
 Effectory ([@effectory](https://twitter.com/effectory))  
 Real Page ([@RealPage](https://twitter.com/RealPage))  
-FireGiant ([@firegiantco](https://twitter.com/firegiantco))  
 Justify ([@justify_legal](https://twitter.com/justify_legal))
 
 ## Individuals
 
 Khalid Abuhakmeh ([@buhakmeh](https://twitter.com/buhakmeh))  
 Rasika Weliwita ([@rasikaweliwita](https://twitter.com/rasikaweliwita))  
 Arun David Shelly  
-Alexander Zeitler ([@alexzeitler_](https://twitter.com/alexzeitler_))  
 Tobias Höft ([@tobiashoeft](https://twitter.com/tobiashoeft))  
-Gusztav Varga ([@gusztavvargadr](https://twitter.com/gusztavvargadr))  
 William Grow  
 James Roberts  
 Chris Simmons ([@netchrisdotcom](https://twitter.com/netchrisdotcom))  
 Shawn Wildermuth  
 Johan Boström ([@zarx](https://twitter.com/zarx))  
-Chris White  
 Albert ([@DerAlbert](https://twitter.com/DerAlbert))  
 Hugo Biarge ([@hbiarge](https://twitter.com/hbiarge))  
 Ibrahim Šuta ([@ibrahimsuta](https://twitter.com/ibrahimsuta))  
@@ -45,16 +41,14 @@ Martijn Boland
 Giuseppe Turitto  
 Mauricio Schneider  
 Norman L Covington  
-Henning Støverud  ([@henningst](https://twitter.com/henningst))  
 Ryan Mendoza  ([@elryry](https://twitter.com/elryry))  
 Colin Blair  
 Erik Gulbrandsen  
 Olga Klimova  
 Alexandru Puiu  
 Michael Calasanz  
 Fredrik Karlsson ([@fredrik_zenit](https://twitter.com/fredrik_zenit))  
-Steve Graddy  
 Jeremy Sinclair ([@sinclairinator](https://twitter.com/sinclairinator))  
-Veikko Eeva  
 Bruno Brito  
 James Hough  
+vanbukin