Moved TODO doc to issue #1929

See https://github.com/ipfs/go-ipfs/pull/1928#discussion_r43626195

License: MIT
Signed-off-by: Richard Littauer <richard.littauer@gmail.com>

dev/crypto-notes.md

-## Important notes
-
-### Key-pair generation
-
-It is critical that we check cryptographic operations to ensure the right amount of entropy is being sourced.
-See: [Issue #911](https://github.com/ipfs/go-ipfs/issues/911)