Tiny cleanups in tracking

src/catch2/internal/catch_run_context.cpp

@@ -156,7 +156,7 @@ namespace Catch {
                 m_generator = std::move( generator );
             }
         };
-        GeneratorTracker::~GeneratorTracker() {}
+        GeneratorTracker::~GeneratorTracker() = default;
     }
 
     RunContext::RunContext(IConfig const* _config, IStreamingReporterPtr&& reporter)

src/catch2/internal/catch_test_case_tracker.cpp

@@ -244,10 +244,6 @@ namespace TestCaseTracking {
 
 } // namespace TestCaseTracking
 
-using TestCaseTracking::ITracker;
-using TestCaseTracking::TrackerContext;
-using TestCaseTracking::SectionTracker;
-
 } // namespace Catch
 
 #if defined(__clang__)

src/catch2/internal/catch_test_case_tracker.hpp

@@ -32,7 +32,7 @@ namespace TestCaseTracking {
 
     using ITrackerPtr = Catch::Detail::unique_ptr<ITracker>;
 
-    class  ITracker {
+    class ITracker {
         NameAndLocation m_nameAndLocation;
 
         using Children = std::vector<ITrackerPtr>;