Comment out unimplemented switch case in ResultValueWalker

The code previously threw a NotImplementedException for the SwitchExpressionSyntax case in the ResultValueWalker. This change comments out that case for now, to prevent the exception from being triggered. It appears the functionality for SwitchExpressionSyntax is not implemented yet.

CSharpFunctionalExtensions.Analyzers/UseResultValueWithoutCheck/ResultValueWalker.cs

@@ -184,8 +184,8 @@ private CheckResult DetermineCheckResult(ExpressionSyntax condition)
                 {
                     RecursivePatternSyntax recursivePatternSyntax => CheckedRecusivePattern(recursivePatternSyntax),
                 };
-            case SwitchExpressionSyntax switchExpressionSyntax:
-                throw new NotImplementedException();
+            // case SwitchExpressionSyntax switchExpressionSyntax:
+            //     throw new NotImplementedException();
         }
 
         return CheckResult.Unchecked;