Remove --bin mediator to suppress a warning

warning: Cargo.toml: file `main.rs` found to be
present in multiple build targets

Author: fadeevab

.github/workflows/test.yml

@@ -24,7 +24,6 @@ jobs:
       - run: cargo run --bin chain-of-responsibility
       - run: cargo build --bin command # TUI. It can run on the local machine.
       - run: cargo run --bin iterator
-      - run: cargo run --bin mediator
       - run: cargo run --bin mediator-top-down
       - run: cargo run --bin mediator-rc-refcell
       - run: cargo run --bin memento

behavioral/mediator/mediator-top-down/Cargo.toml

@@ -3,10 +3,6 @@ edition = "2021"
 name = "mediator-top-down"
 version = "0.1.0"
 
-[[bin]]
-name = "mediator"
-path = "main.rs"
-
 [[bin]]
 name = "mediator-top-down"
 path = "main.rs"