Remove figment and replace with custom environment variable handling

Signed-off-by: James Rhodes <jarhodes314@gmail.com>

Author: jarhodes314

Cargo.lock

@@ -170,7 +170,6 @@ rustls-native-certs = "0.8.1"
 rustls-pemfile = "2.2"
 sd-listen-fds = "0.2.0"
 serde = "1.0"
-serde_ignored = "0.1"
 serde_json = "1.0"
 sha1 = "0.10"
 sha256 = "1.1"

Cargo.toml

@@ -27,7 +27,6 @@ regex = { workspace = true }
 reqwest = { workspace = true, features = ["rustls-tls-native-roots"] }
 rustls = { workspace = true }
 serde = { workspace = true, features = ["rc"] }
-serde_ignored = { workspace = true }
 strum = { workspace = true }
 strum_macros = { workspace = true }
 tedge_config_macros = { workspace = true }