Remove origin field from PDUs

It has been removed from the spec, for details see
https://github.com/matrix-org/matrix-spec/pull/998

crates/ruma-state-res/Cargo.toml

@@ -17,9 +17,6 @@ all-features = true
 compat = []
 unstable-exhaustive-types = []
 
-# Private, only used in test / benchmarking code
-__ci = ["ruma-common/unstable-pre-spec"]
-
 [dependencies]
 itertools = "0.10.0"
 js_int = "0.2.0"

crates/ruma-state-res/benches/state_res_bench.rs

@@ -395,8 +395,6 @@ where
             content,
             redacts: None,
             unsigned: btreemap! {},
-            #[cfg(not(feature = "__ci"))]
-            origin: "foo".into(),
             auth_events,
             prev_events,
             depth: uint!(0),

crates/ruma-state-res/src/test_utils.rs

@@ -403,8 +403,6 @@ pub fn to_init_pdu_event(
             content,
             redacts: None,
             unsigned: BTreeMap::new(),
-            #[cfg(not(feature = "__ci"))]
-            origin: "foo".into(),
             auth_events: vec![],
             prev_events: vec![],
             depth: uint!(0),
@@ -443,8 +441,6 @@ where
             content,
             redacts: None,
             unsigned: BTreeMap::new(),
-            #[cfg(not(feature = "__ci"))]
-            origin: "foo".into(),
             auth_events,
             prev_events,
             depth: uint!(0),