Remove bstm gas meter docs as unnecessary

sdk/next/experimental/blockstm.mdx

@@ -19,7 +19,7 @@
 
 ## Background
 
 Block-STM is an algorithm originally published in the [Block-STM paper](https://arxiv.org/pdf/2203.06871) and implemented for the Aptos blockchain. The algorithm was then written for Cosmos SDK compatible chains in Go by developers for the Cronos blockchain in [go-block-stm](https://github.com/crypto-org-chain/go-block-stm).
 
 This library was forked and directly integrated into the Cosmos SDK with accompanying changes to the `baseapp` and `store` packages. Subsequent changes and improvements have been made on top of the original implementation to further optimize performance in both memory and time.
 
@@ -128,7 +128,7 @@
 
 ### Full Wiring Example
 
 Here is a complete example taken from the Cosmos EVM's `evmd` application:
 
 ```go
 bApp.SetBlockSTMTxRunner(txnrunner.NewSTMRunner(
@@ -146,14 +146,6 @@
 
 Work has already been done within the SDK and Cosmos EVM for common transaction types such as bank sends and EVM gas sends. The following steps describe the additional configuration needed.
 
-### Disable the Block Gas Meter
-
-The block gas meter is difficult to support when executing transactions in parallel. Disabling it is safe if validators validate the total gas wanted in `ProcessProposal`, which is the case in the default handler.
-
-```go
-bApp.SetDisableBlockGasMeter(true)
-```
-
 ### Enable Virtual Fee Collection (EVM-specific)
 
 This alters how fee collection works for EVM transactions, accumulating fees to the fee collector module in the `EndBlocker` instead of using regular sends during transaction execution.