Remove Digitalcourage3 relays from fallbackdir list

Somehow they ended up in the list and they were not suppose to. The operator just emailed me about it.

Removal is:

9EAD5B2D3DBD96DBC80DCE423B0C345E920A758D
ADB2C26629643DBB9F8FE0096E7D16F9414B4F8D
C2AAB088555850FC434E68943F551072042B85F1

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information