Switch ui tests to trybuild

test_suite/tests/ui/identifier/both.stderr

@@ -9,6 +9,3 @@ error: #[serde(field_identifier)] and #[serde(variant_identifier)] cannot both b
   |
 4 | #[serde(field_identifier, variant_identifier)]
   |                           ^^^^^^^^^^^^^^^^^^
-
-error: aborting due to 2 previous errors
-

test_suite/tests/ui/identifier/field_struct.stderr

@@ -3,6 +3,3 @@ error: #[serde(field_identifier)] can only be used on an enum
   |
 5 | struct S;
   | ^^^^^^
-
-error: aborting due to previous error
-

test_suite/tests/ui/identifier/field_tuple.stderr

@@ -3,6 +3,3 @@ error: #[serde(field_identifier)] may only contain unit variants
   |
 7 |     B(u8, u8),
   |     ^^^^^^^^^
-
-error: aborting due to previous error
-

test_suite/tests/ui/identifier/newtype_not_last.stderr

@@ -3,6 +3,3 @@ error: `Other` must be the last variant
   |
 7 |     Other(String),
   |     ^^^^^^^^^^^^^
-
-error: aborting due to previous error
-

test_suite/tests/ui/identifier/not_unit.stderr

@@ -4,6 +4,3 @@ error: #[serde(other)] must be on a unit variant
 7 | /     #[serde(other)]
 8 | |     Other(u8, u8),
   | |_________________^
-
-error: aborting due to previous error
-

test_suite/tests/ui/identifier/other_not_last.stderr

@@ -4,6 +4,3 @@ error: #[serde(other)] must be on the last variant
 7 | /     #[serde(other)]
 8 | |     Other,
   | |_________^
-
-error: aborting due to previous error
-

test_suite/tests/ui/identifier/other_untagged.stderr

@@ -4,6 +4,3 @@ error: #[serde(other)] cannot appear on untagged enum
 6 | /     #[serde(other)]
 7 | |     Other,
   | |_________^
-
-error: aborting due to previous error
-

test_suite/tests/ui/identifier/other_variant.stderr

@@ -4,6 +4,3 @@ error: #[serde(other)] may not be used on a variant identifier
 6 | /     #[serde(other)]
 7 | |     Other,
   | |_________^
-
-error: aborting due to previous error
-

test_suite/tests/ui/identifier/variant_struct.stderr

@@ -3,6 +3,3 @@ error: #[serde(variant_identifier)] can only be used on an enum
   |
 5 | struct S;
   | ^^^^^^
-
-error: aborting due to previous error
-

test_suite/tests/ui/identifier/variant_tuple.stderr

@@ -3,6 +3,3 @@ error: #[serde(variant_identifier)] may only contain unit variants
   |
 7 |     B(u8, u8),
   |     ^^^^^^^^^
-
-error: aborting due to previous error
-