Remove unused function

src/catch2/internal/catch_run_context.cpp

@@ -136,10 +136,6 @@ namespace Catch {
         return deltaTotals;
     }
 
-    IConfigPtr RunContext::config() const {
-        return m_config;
-    }
-
     IStreamingReporter& RunContext::reporter() const {
         return *m_reporter;
     }

src/catch2/internal/catch_run_context.hpp

@@ -45,7 +45,6 @@ namespace Catch {
 
         Totals runTest(TestCaseHandle const& testCase);
 
-        IConfigPtr config() const;
         IStreamingReporter& reporter() const;
 
     public: // IResultCapture