Remove obsolete build script

Author: Turbo87

Cargo.toml

@@ -107,8 +107,3 @@ claims = "=0.7.1"
 hyper-tls = "=0.5.0"
 insta = { version = "=1.34.0", features = ["json", "redactions"] }
 tokio = "=1.34.0"
-
-[build-dependencies]
-diesel = { version = "=2.1.3", features = ["postgres"] }
-diesel_migrations = { version = "=2.1.0", features = ["postgres"] }
-dotenvy = "=0.15.7"