chore: Removed dotenvy

Since secrets can now be set from automation.toml the .env file was no
longer used, so dotenvy can be removed.

Cargo.lock

@@ -96,7 +96,6 @@ dependencies = [
  "automation_lib",
  "axum",
  "config",
- "dotenvy",
  "git-version",
  "google_home",
  "mlua",
@@ -433,12 +432,6 @@ dependencies = [
  "syn 2.0.106",
 ]
 
-[[package]]
-name = "dotenvy"
-version = "0.15.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1aaf95b3e5c8f23aa320147307562d361db0ae0d51242340f558153b4eb2439b"
-
 [[package]]
 name = "dyn-clone"
 version = "1.0.20"