Remove confusing comment from hardware files

As commented here, this block should be removed from the following files:

find . -type f -exec grep --color=auto -nH --null -e 'generated by .nixos-generate-config.' \{\} +
./morph/grid/production/storage005-hardware.nix1:# Do not modify this file!  It was generated by ‘nixos-generate-config’
./morph/grid/production/storage002-hardware.nix1:# Do not modify this file!  It was generated by ‘nixos-generate-config’
./morph/grid/production/storage004-hardware.nix1:# Do not modify this file!  It was generated by ‘nixos-generate-config’
./morph/grid/production/storage001-hardware.nix1:# Do not modify this file!  It was generated by ‘nixos-generate-config’
./morph/grid/production/storage003-hardware.nix1:# Do not modify this file!  It was generated by ‘nixos-generate-config’
./morph/grid/hro-cloud/storage002-hardware.nix1:# Do not modify this file!  It was generated by ‘nixos-generate-config’
./morph/grid/hro-cloud/storage001-hardware.nix1:# Do not modify this file!  It was generated by ‘nixos-generate-config’
./morph/grid/hro-cloud/storage003-hardware.nix1:# Do not modify this file!  It was generated by ‘nixos-generate-config’