[docs] no need to create src/branch/master/nextgraph/src/local_broker_dev_env.rs

It [exists](https://git.nextgraph.org/NextGraph/nextgraph-rs/src/branch/master/nextgraph/src/local_broker_dev_env.rs)

DEV.md

@@ -12,14 +12,6 @@ until this [PR](https://github.com/rustwasm/wasm-pack/pull/1271) is accepted, wi
 cargo install wasm-pack --git https://github.com/rustwasm/wasm-pack.git --rev c2b663f25abe50631a236d57a8c6d7fd806413b2
 ```
 
-then :
-
-create a file called `nextgraph/src/local_broker_dev_env.rs` with the content :
-
-```
-pub const PEER_ID: &str = "FtdzuDYGewfXWdoPuXIPb0wnd0SAg1WoA2B14S7jW3MA";
-```
-
 once your ngd server will run in your dev env, replace the above string with the actual PEER ID of your ngd server.
 
 ```