Removed support for async-std

Author: gammelalf

Cargo.toml

@@ -25,7 +25,7 @@ futures = { version = "~0.3" }
 pin-project = { version = "~1" }
 
 # SQL executor. Optional because it requires a runtime and a TLS implementation.
-sqlx = { version = "~0.8", optional = true, default-features = false, features = ["json", "time", "chrono", "uuid"] }
+sqlx = { version = "~0.8", optional = true, default-features = false, features = ["json", "time", "chrono", "uuid", "runtime-tokio"] }
 
 # Logging facade
 log = { version = "~0.4" }
@@ -77,14 +77,6 @@ postgres-only = [
     "sqlx/bit-vec",
 ]
 
-# sqlx runtime
-async-std = [
-    "sqlx/runtime-async-std"
-]
-tokio = [
-    "sqlx/runtime-tokio"
-]
-
 # sqlx tls
 rustls = [
     "sqlx/tls-rustls"