once_cell in std from 1.70 (#14402)

* once_cell now stable

* cargo fmt

---------

Co-authored-by: parity-processbot <>

substrate/Cargo.lock

@@ -2817,7 +2817,6 @@ dependencies = [
  "k256",
  "log",
  "macro_magic",
- "once_cell",
  "parity-scale-codec",
  "paste",
  "pretty_assertions",
@@ -9564,7 +9563,6 @@ dependencies = [
  "cfg-if",
  "libc",
  "log",
- "once_cell",
  "parity-scale-codec",
  "paste",
  "rustix 0.36.14",
@@ -10248,7 +10246,6 @@ dependencies = [
  "lazy_static",
  "libc",
  "log",
- "once_cell",
  "parking_lot 0.12.1",
  "regex",
  "rustc-hash",