hashes:sha3: Remove unused functions from Keccak code
hashes:sha3: Remove unused functions from Keccak code

Remove unused SHAKE functions
Removed unused SHA3-224

x3ro/RIOT,avmelnikoff/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,neiljay/RIOT,miri64/RIOT,kYc0o/RIOT,x3ro/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,kbumsik/RIOT,smlng/RIOT,A-Paul/RIOT,OlegHahm/RIOT,kYc0o/RIOT,jasonatran/RIOT,kYc0o/RIOT,rfuentess/RIOT,BytesGalore/RIOT,BytesGalore/RIOT,toonst/RIOT,mfrey/RIOT,yogo1212/RIOT,biboc/RIOT,rfuentess/RIOT,biboc/RIOT,neiljay/RIOT,yogo1212/RIOT,josephnoir/RIOT,toonst/RIOT,x3ro/RIOT,mtausig/RIOT,BytesGalore/RIOT,kbumsik/RIOT,josephnoir/RIOT,smlng/RIOT,biboc/RIOT,aeneby/RIOT,gebart/RIOT,lazytech-org/RIOT,kYc0o/RIOT,rfuentess/RIOT,OlegHahm/RIOT,miri64/RIOT,neiljay/RIOT,aeneby/RIOT,yogo1212/RIOT,gebart/RIOT,kbumsik/RIOT,ant9000/RIOT,avmelnikoff/RIOT,gebart/RIOT,mtausig/RIOT,kaspar030/RIOT,A-Paul/RIOT,BytesGalore/RIOT,authmillenon/RIOT,neiljay/RIOT,mfrey/RIOT,basilfx/RIOT,OlegHahm/RIOT,biboc/RIOT,kaspar030/RIOT,kbumsik/RIOT,OTAkeys/RIOT,kaspar030/RIOT,cladmi/RIOT,lazytech-org/RIOT,toonst/RIOT,josephnoir/RIOT,biboc/RIOT,OlegHahm/RIOT,yogo1212/RIOT,ant9000/RIOT,yogo1212/RIOT,lazytech-org/RIOT,kaspar030/RIOT,OTAkeys/RIOT,toonst/RIOT,A-Paul/RIOT,authmillenon/RIOT,lazytech-org/RIOT,jasonatran/RIOT,authmillenon/RIOT,miri64/RIOT,cladmi/RIOT,avmelnikoff/RIOT,aeneby/RIOT,kYc0o/RIOT,A-Paul/RIOT,rfuentess/RIOT,kbumsik/RIOT,josephnoir/RIOT,josephnoir/RIOT,mtausig/RIOT,mfrey/RIOT,OTAkeys/RIOT,smlng/RIOT,yogo1212/RIOT,avmelnikoff/RIOT,basilfx/RIOT,mtausig/RIOT,aeneby/RIOT,ant9000/RIOT,RIOT-OS/RIOT,gebart/RIOT,authmillenon/RIOT,aeneby/RIOT,miri64/RIOT,basilfx/RIOT,cladmi/RIOT,authmillenon/RIOT,neiljay/RIOT,RIOT-OS/RIOT,avmelnikoff/RIOT,jasonatran/RIOT,rfuentess/RIOT,mfrey/RIOT,x3ro/RIOT,smlng/RIOT,basilfx/RIOT,basilfx/RIOT,RIOT-OS/RIOT,BytesGalore/RIOT,RIOT-OS/RIOT,mtausig/RIOT,A-Paul/RIOT,cladmi/RIOT,ant9000/RIOT,toonst/RIOT,lazytech-org/RIOT,mfrey/RIOT,miri64/RIOT,ant9000/RIOT,cladmi/RIOT,kaspar030/RIOT,smlng/RIOT,x3ro/RIOT,gebart/RIOT,jasonatran/RIOT,jasonatran/RIOT,OTAkeys/RIOT