Revert "unix: Include stdio.h to allow easy debugging with printf()."
Revert "unix: Include stdio.h to allow easy debugging with printf()."

This reverts commit 8fbabab1a80efa8b9c0654f63b2157d8f8299955. Turned to
cause problems on MacOSX.

xhat/micropython,turbinenreiter/micropython,drrk/micropython,EcmaXp/micropython,firstval/micropython,PappaPeppar/micropython,jlillest/micropython,matthewelse/micropython,chrisdearman/micropython,matthewelse/micropython,pramasoul/micropython,AriZuu/micropython,dhylands/micropython,supergis/micropython,cnoviello/micropython,ceramos/micropython,blmorris/micropython,stonegithubs/micropython,torwag/micropython,supergis/micropython,xhat/micropython,Timmenem/micropython,puuu/micropython,omtinez/micropython,orionrobots/micropython,rubencabrera/micropython,oopy/micropython,ryannathans/micropython,ruffy91/micropython,dhylands/micropython,cnoviello/micropython,vitiral/micropython,tralamazza/micropython,cloudformdesign/micropython,turbinenreiter/micropython,noahwilliamsson/micropython,ganshun666/micropython,mpalomer/micropython,firstval/micropython,vriera/micropython,danicampora/micropython,cloudformdesign/micropython,SHA2017-badge/micropython-esp32,pfalcon/micropython,ernesto-g/micropython,selste/micropython,utopiaprince/micropython,heisewangluo/micropython,skybird6672/micropython,turbinenreiter/micropython,martinribelotta/micropython,ahotam/micropython,pozetroninc/micropython,utopiaprince/micropython,xuxiaoxin/micropython,lowRISC/micropython,ceramos/micropython,lowRISC/micropython,pramasoul/micropython,tdautc19841202/micropython,suda/micropython,blazewicz/micropython,xuxiaoxin/micropython,jlillest/micropython,dhylands/micropython,noahchense/micropython,praemdonck/micropython,micropython/micropython-esp32,jmarcelino/pycom-micropython,vitiral/micropython,dxxb/micropython,tdautc19841202/micropython,oopy/micropython,redbear/micropython,hosaka/micropython,toolmacher/micropython,adafruit/micropython,blmorris/micropython,Timmenem/micropython,emfcamp/micropython,feilongfl/micropython,matthewelse/micropython,emfcamp/micropython,cnoviello/micropython,toolmacher/micropython,pozetroninc/micropython,orionrobots/micropython,matthewelse/micropython,HenrikSolver/micropython,HenrikSolver/micropython,ahotam/micropython,neilh10/micropython,danicampora/micropython,micropython/micropython-esp32,misterdanb/micropython,heisewangluo/micropython,hosaka/micropython,deshipu/micropython,dxxb/micropython,drrk/micropython,ceramos/micropython,ChuckM/micropython,mianos/micropython,slzatz/micropython,henriknelson/micropython,ernesto-g/micropython,alex-march/micropython,galenhz/micropython,mgyenik/micropython,ryannathans/micropython,jlillest/micropython,mgyenik/micropython,stonegithubs/micropython,ChuckM/micropython,lbattraw/micropython,tdautc19841202/micropython,hosaka/micropython,TDAbboud/micropython,jimkmc/micropython,mpalomer/micropython,mianos/micropython,ahotam/micropython,firstval/micropython,MrSurly/micropython,ganshun666/micropython,xyb/micropython,mpalomer/micropython,infinnovation/micropython,praemdonck/micropython,henriknelson/micropython,MrSurly/micropython,praemdonck/micropython,deshipu/micropython,micropython/micropython-esp32,neilh10/micropython,ganshun666/micropython,ryannathans/micropython,Peetz0r/micropython-esp32,pozetroninc/micropython,jmarcelino/pycom-micropython,tobbad/micropython,adamkh/micropython,swegener/micropython,noahchense/micropython,jimkmc/micropython,omtinez/micropython,jlillest/micropython,cloudformdesign/micropython,MrSurly/micropython-esp32,danicampora/micropython,tdautc19841202/micropython,omtinez/micropython,toolmacher/micropython,oopy/micropython,deshipu/micropython,martinribelotta/micropython,EcmaXp/micropython,skybird6672/micropython,tralamazza/micropython,slzatz/micropython,mgyenik/micropython,adafruit/micropython,rubencabrera/micropython,slzatz/micropython,kostyll/micropython,adafruit/micropython,vitiral/micropython,ChuckM/micropython,adamkh/micropython,mhoffma/micropython,mhoffma/micropython,redbear/micropython,infinnovation/micropython,skybird6672/micropython,mgyenik/micropython,cwyark/micropython,martinribelotta/micropython,tobbad/micropython,pfalcon/micropython,vriera/micropython,SHA2017-badge/micropython-esp32,drrk/micropython,tobbad/micropython,xyb/micropython,trezor/micropython,mianos/micropython,torwag/micropython,puuu/micropython,kostyll/micropython,xuxiaoxin/micropython,noahchense/micropython,alex-march/micropython,alex-robbins/micropython,blazewicz/micropython,torwag/micropython,lbattraw/micropython,hosaka/micropython,kerneltask/micropython,ernesto-g/micropython,cnoviello/micropython,supergis/micropython,MrSurly/micropython-esp32,TDAbboud/micropython,PappaPeppar/micropython,adafruit/circuitpython,torwag/micropython,infinnovation/micropython,drrk/micropython,trezor/micropython,mpalomer/micropython,ceramos/micropython,jmarcelino/pycom-micropython,kerneltask/micropython,lbattraw/micropython,bvernoux/micropython,jmarcelino/pycom-micropython,vriera/micropython,xhat/micropython,ganshun666/micropython,micropython/micropython-esp32,alex-robbins/micropython,lbattraw/micropython,xyb/micropython,alex-march/micropython,puuu/micropython,alex-march/micropython,cloudformdesign/micropython,emfcamp/micropython,ho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hz/micropython,blazewicz/micropython,HenrikSolver/micropython,misterdanb/micropython,orionrobots/micropython,drrk/micropython,hiway/micropython,noahchense/micropython,blazewicz/micropython,alex-robbins/micropython,noahchense/micropython,Timmenem/micropython,dhylands/micropython,martinribelotta/micropython,misterdanb/micropython,neilh10/micropython,mhoffma/micropython,suda/micropython