parse_args: remove duplicate test of dotenv variables

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

advotracker/src/parse_args.rs

@@ -142,13 +142,6 @@ SMR Unerledigt: 089 92529 60222")
     env_prefix.push_str("_");
     viperus.set_env_prefix(&env_prefix);
 
-    // respect dotenv environment (e.g for testing)
-    // -> overwrites the preset default values
-    println!(
-        "RUST_LOG={}",
-        dotenv::var("RUST_LOG").unwrap_or_else(|_| String::from("None"))
-    );
-
     // enable caching and automatic update of environment values
     viperus.cache(true);
     viperus.automatic_env(true);