[Backport] Removed redundant else statement #15436
                
     Merged
            
            
          
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Original PR: #14540
Description
The "else" statement removed within a scope of app/code/Magento/ConfigurableImportExport/Model/Import/Product/Type/Configurable.php
Usage of "else" in this case can be avoided
Fixed Issues (if relevant)
No, just code improvements
Manual testing scenarios
No, just code improvements