Remove unused usings

Author: jnyrup

Src/FluentAssertions.DataSets/DataRowAssertions.cs

@@ -4,7 +4,6 @@
 using System.Diagnostics;
 using System.Linq;
 using FluentAssertions.DataSets.Common;
-using FluentAssertions.Equivalency;
 using FluentAssertions.Execution;
 using FluentAssertions.Primitives;
 

Src/FluentAssertions.DataSets/DataTableAssertions.cs

@@ -4,7 +4,6 @@
 using System.Diagnostics;
 using System.Linq;
 using FluentAssertions.DataSets.Common;
-using FluentAssertions.Equivalency;
 using FluentAssertions.Execution;
 using FluentAssertions.Primitives;
 

Src/FluentAssertions.DataSets/DataTableCollectionAssertionExtensions.cs

@@ -4,7 +4,6 @@
 using FluentAssertions.Collections;
 using FluentAssertions.DataSets;
 using FluentAssertions.DataSets.Common;
-using FluentAssertions.Execution;
 
 // ReSharper disable once CheckNamespace
 namespace FluentAssertions;