simplify test error matching

Signed-off-by: Facundo Tuesca <facundo.tuesca@trailofbits.com>

Author: facutuesca

tests/hazmat/asn1/test_api.py

@@ -238,11 +238,8 @@ class Example:
     def test_fail_unsupported_size_annotation(self) -> None:
         with pytest.raises(
             TypeError,
-            match=re.escape(
-                "field invalid has a SIZE annotation, but SIZE "
-                "annotations are only supported for fields of types: "
-                "[SEQUENCE OF, BIT STRING]"
-            ),
+            match="field invalid has a SIZE annotation, but SIZE "
+            "annotations are only supported for fields of types: ",
         ):
 
             @asn1.sequence