simplify docs

docs/accounts.md

@@ -50,6 +50,5 @@ Frontier's Template will pre-fund several well-known addresses that (mostly) con
 Frontier provides two different runtimes, one for each strategy.
 You can choose which one want to build by using the `--feature` flag. For example:
 ```
-$ cargo build --release                             # this builds a runtime with H256 -> H160
-mapping
-$ cargo build --release --features unified-accounts # this build a runtime with Unified Accounts
+$ cargo build                             # this builds a runtime with H256 -> H160 mapping
+$ cargo build --features unified-accounts # this build a runtime with Unified Accounts