Remove dependency on ipfs-block-service #2047

> npm explain ipfs-block-service
ipfs-block-service@0.19.0
node_modules/ipld/node_modules/ipfs-block-service
  ipfs-block-service@"^0.19.0" from ipld@0.29.0
  node_modules/ipld
    ipld@"0.29.0" from ipld-explorer-components@2.4.1
    node_modules/ipld-explorer-components
      ipld-explorer-components@"^2.4.1" from the root project