fix(nix-compat-derive-tests): Get rid of compile-tests flag

Because we are now using mkCargoBuild to build this crate in CI we can
get rid of the compile-tests flag and always run the compile tests.
This is because the trybuild crate works when using the the same build
method we used for rustdoc an clippy.

Change-Id: I3f168a987a09bf6f3e3e7c1ab3aaa1acd9d010cf
Reviewed-on: https://cl.snix.dev/c/snix/+/30651
Reviewed-by: Florian Klink <flokli@flokli.de>
Autosubmit: Brian Olsen <brian@maven-group.org>
Tested-by: besadii

snix/Cargo.nix

@@ -8489,8 +8489,7 @@ rec {
             packageId = "trybuild";
           }
         ];
-        features = { };
-        resolvedDefaultFeatures = [ "compile-tests" ];
+
       };
       "nix-daemon" = rec {
         crateName = "nix-daemon";

snix/nix-compat-derive-tests/Cargo.toml

@@ -3,9 +3,6 @@ name = "nix-compat-derive-tests"
 version = "0.1.0"
 edition = "2024"
 
-[features]
-compile-tests = []
-
 [dev-dependencies]
 hex-literal.workspace = true
 pretty_assertions.workspace = true

snix/nix-compat-derive-tests/tests/ui.rs

@@ -1,4 +1,3 @@
-#[cfg(feature = "compile-tests")]
 #[test]
 fn ui() {
     let t = trybuild::TestCases::new();

snix/nix-compat-derive-tests/tests/ui/deserialize_bad_type.stderr

@@ -5,14 +5,14 @@ error[E0277]: the trait bound `BadType: NixDeserialize` is not satisfied
   |              ^^^^^^^ the trait `NixDeserialize` is not implemented for `BadType`
   |
   = help: the following other types implement trait `NixDeserialize`:
+            AddToStoreNarRequest
             BTreeMap<K, V>
+            CAHash
             ClientSettings
             IgnoredZero
+            NarHash
             Operation
-            StorePath<String>
-            String
-            Test
-            Vec<T>
+            Option<CAHash>
           and $N others
 note: required by a bound in `try_read_value`
  --> $WORKSPACE/nix-compat/src/wire/de/mod.rs

snix/nix-compat-derive-tests/tests/ui/deserialize_from_str_missing.stderr

@@ -5,12 +5,12 @@ error[E0277]: the trait bound `Test: FromStr` is not satisfied
   |       ^^^^^^^^ the trait `FromStr` is not implemented for `Test`
   |
   = help: the following other types implement trait `FromStr`:
+            ByteString
+            CString
             IpAddr
             Ipv4Addr
             Ipv6Addr
             NonZero<i128>
             NonZero<i16>
             NonZero<i32>
-            NonZero<i64>
-            NonZero<i8>
           and $N others

snix/nix-compat-derive-tests/tests/ui/deserialize_try_from_missing.stderr

@@ -2,7 +2,7 @@ error[E0277]: the trait bound `Test: From<u64>` is not satisfied
  --> tests/ui/deserialize_try_from_missing.rs:4:18
   |
 4 | #[nix(try_from = "u64")]
-  |                  ^^^^^ the trait `From<u64>` is not implemented for `Test`, which is required by `Test: TryFrom<u64>`
+  |                  ^^^^^ the trait `From<u64>` is not implemented for `Test`
   |
   = note: required for `u64` to implement `Into<Test>`
   = note: required for `Test` to implement `TryFrom<u64>`