unix/modsocket: Remove unnecessary asserts.
unix/modsocket: Remove unnecessary asserts.

These checks are already made, and errors reported, by the uPy runtime.

lowRISC/micropython,trezor/micropython,adafruit/micropython,dmazzella/micropython,lowRISC/micropython,adafruit/circuitpython,tralamazza/micropython,pozetroninc/micropython,chrisdearman/micropython,TDAbboud/micropython,MrSurly/micropython,henriknelson/micropython,pozetroninc/micropython,Timmenem/micropython,torwag/micropython,adafruit/micropython,PappaPeppar/micropython,lowRISC/micropython,AriZuu/micropython,trezor/micropython,chrisdearman/micropython,tralamazza/micropython,bvernoux/micropython,pfalcon/micropython,HenrikSolver/micropython,deshipu/micropython,tobbad/micropython,infinnovation/micropython,blazewicz/micropython,HenrikSolver/micropython,adafruit/circuitpython,MrSurly/micropython,kerneltask/micropython,selste/micropython,pramasoul/micropython,tralamazza/micropython,MrSurly/micropython-esp32,pfalcon/micropython,AriZuu/micropython,dmazzella/micropython,PappaPeppar/micropython,micropython/micropython-esp32,adafruit/circuitpython,alex-robbins/micropython,pozetroninc/micropython,SHA2017-badge/micropython-esp32,swegener/micropython,alex-robbins/micropython,henriknelson/micropython,selste/micropython,TDAbboud/micropython,pramasoul/micropython,bvernoux/micropython,kerneltask/micropython,SHA2017-badge/micropython-esp32,alex-robbins/micropython,HenrikSolver/micropython,tobbad/micropython,torwag/micropython,henriknelson/micropython,deshipu/micropython,selste/micropython,infinnovation/micropython,bvernoux/micropython,adafruit/micropython,MrSurly/micropython-esp32,MrSurly/micropython,SHA2017-badge/micropython-esp32,oopy/micropython,chrisdearman/micropython,oopy/micropython,MrSurly/micropython,PappaPeppar/micropython,micropython/micropython-esp32,deshipu/micropython,oopy/micropython,alex-robbins/micropython,pozetroninc/micropython,AriZuu/micropython,infinnovation/micropython,TDAbboud/micropython,pfalcon/micropython,PappaPeppar/micropython,oopy/micropython,trezor/micropython,swegener/micropython,PappaPeppar/micropython,bvernoux/micropython,dmazzella/micropython,Timmenem/micropython,chrisdearman/micropython,SHA2017-badge/micropython-esp32,adafruit/circuitpython,chrisdearman/micropython,pfalcon/micropython,blazewicz/micropython,AriZuu/micropython,kerneltask/micropython,henriknelson/micropython,micropython/micropython-esp32,swegener/micropython,MrSurly/micropython-esp32,pozetroninc/micropython,TDAbboud/micropython,bvernoux/micropython,Timmenem/micropython,dmazzella/micropython,MrSurly/micropython-esp32,torwag/micropython,MrSurly/micropython,blazewicz/micropython,trezor/micropython,Timmenem/micropython,infinnovation/micropython,micropython/micropython-esp32,pfalcon/micropython,swegener/micropython,tobbad/micropython,pramasoul/micropython,infinnovation/micropython,adafruit/circuitpython,SHA2017-badge/micropython-esp32,selste/micropython,torwag/micropython,ryannathans/micropython,pramasoul/micropython,lowRISC/micropython,ryannathans/micropython,oopy/micropython,Timmenem/micropython,lowRISC/micropython,alex-robbins/micropython,blazewicz/micropython,kerneltask/micropython,micropython/micropython-esp32,deshipu/micropython,TDAbboud/micropython,HenrikSolver/micropython,adafruit/micropython,selste/micropython,deshipu/micropython,MrSurly/micropython-esp32,ryannathans/micropython,torwag/micropython,henriknelson/micropython,blazewicz/micropython,adafruit/circuitpython,ryannathans/micropython,adafruit/micropython,swegener/micropython,ryannathans/micropython,kerneltask/micropython,HenrikSolver/micropython,pramasoul/micropython,trezor/micropython,AriZuu/micropython,tralamazza/micropython,tobbad/micropython,tobbad/micropython