docs: remove Blockspace Race section (#1329)

This section seems no longer necessary considering Blockspace Race is over.

nodes/hardfork-process.md

@@ -62,18 +62,3 @@ new keys in order to have a successful upgrade.
 Those two keys will need to be added to 2 new flags on `celestia-app`:
 
 - `--evm-address`: This flag should contain a `0x` EVM address.
-
-### Blockspace race hardfork
-
-The Blockspace Race hardfork process will follow
-a different workflow than regular Tendermint and Cosmos-SDK
-network upgrades.
-
-Instead of using tools like Cosmovisor and swapping binaries at block
-activation number, validators will be upgrading to new binaries
-ahead of the hardfork block number. The new binaries will have
-the new logic and features for activating when the target block
-number for the hardfork is reached.
-
-To prepare for the hardfork, please upgrade to the new `celestia-app`
-version referenced in the Blockspace Race task.