remove BeJson overload

Author: maurei

Diff for: test/OpenApiTests/JsonElementExtensions.cs

@@ -75,12 +75,5 @@ public void ContainProperty(string propertyName)
             Execute.Assertion.ForCondition(_subject.TryGetProperty(propertyName, out _))
                 .FailWith($"Expected JSON element '{escapedJson}' to contain a property named '{propertyName}'.");
         }
-
-        public void BeJson(string expectedDocument)
-        {
-            string json = _subject.ToString();
-
-            json.Should().BeJson(expectedDocument);
-        }
     }
 }

Diff for: test/OpenApiTests/LegacyOpenApiIntegration/LegacyOpenApiIntegrationTests.cs

@@ -1,5 +1,7 @@
 using System.Reflection;
 using System.Text.Json;
+using FluentAssertions;
+using TestBuildingBlocks;
 using Xunit;
 
 namespace OpenApiTests.LegacyOpenApiIntegration;
@@ -21,10 +23,11 @@ public async Task Retrieved_document_matches_expected_document()
         string expectedDocument = await LoadEmbeddedResourceAsync(embeddedResourceName);
 
         // Act
-        JsonElement actualDocument = await LazyDocument.Value;
+        JsonElement jsonElement = await LazyDocument.Value;
 
         // Assert
-        actualDocument.Should().BeJson(expectedDocument);
+        string jsonText = jsonElement.ToString();
+        jsonText.Should().BeJson(expectedDocument);
     }
 
     private static async Task<string> LoadEmbeddedResourceAsync(string name)