Remove the duplicate code

Author: junichi11

src/main/java/com/welovecoding/nbeditorconfig/processor/EditorConfigProcessor.java

@@ -194,11 +194,6 @@ protected FileInfo excuteOperations(DataObject dataObject, MappedEditorConfig co
       fileChangeNeeded = fileChangeNeeded || trimmedWhiteSpaces;
     }
 
-    if (mappedCharset != null) {
-    } else {
-      info.setCharset(StandardCharsets.UTF_8);
-    }
-
     info.setFileChangeNeeded(fileChangeNeeded);
     info.setStyleFlushNeeded(styleFlushNeeded);