Fix conditional logic for solution file extension handling

framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/RemoveProjectFromSolutionStep.cs

@@ -29,8 +29,7 @@ public class RemoveProjectFromSolutionStep : ProjectBuildPipelineStep
         {
             _solutionFilePathWithoutFileExtension = solutionFilePathWithoutFileExtension.RemovePostFix(".sln");
         }
-        
+        else if (solutionFilePathWithoutFileExtension != null && solutionFilePathWithoutFileExtension.EndsWith(".slnx"))
-        if (solutionFilePathWithoutFileExtension != null && solutionFilePathWithoutFileExtension.EndsWith(".slnx"))
         {
             _solutionFilePathWithoutFileExtension = solutionFilePathWithoutFileExtension.RemovePostFix(".slnx");
         }