Revert "json: deserialize note ids into bytes"

This reverts commit 1ba597fc0a.

enostr/Cargo.lock

@@ -108,7 +108,6 @@ name = "enostr"
 version = "0.1.0"
 dependencies = [
  "ewebsock",
- "hex",
  "serde",
  "serde_derive",
  "serde_json",
@@ -259,12 +258,6 @@ dependencies = [
  "wasi",
 ]
 
-[[package]]
-name = "hex"
-version = "0.4.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
-
 [[package]]
 name = "http"
 version = "0.2.8"