refactor: optimize structures

Author: xepozz

src/main/kotlin/com/github/xepozz/git_churn/GitChurnDescriptor.kt

@@ -12,6 +12,5 @@ data class GitChurnDescriptor(
 }
 
 data class FileNodeDescriptor(
-    val path: VirtualFile,
     val changeCount: Int,
 )

src/main/kotlin/com/github/xepozz/git_churn/OutputParser.kt

@@ -25,7 +25,6 @@ object OutputParser {
             if (virtualFile != null && virtualFile.exists()) {
                 result.maxCount = maxOf(result.maxCount, count)
                 result.filesInfo[virtualFile] = FileNodeDescriptor(
-                    path = virtualFile,
                     changeCount = count,
                 )
             }
@@ -74,7 +73,6 @@ object OutputParser {
                 val changeCount = findMaxChangeCountForDirectory(directory, filesInfo)
                 maxCount = maxOf(maxCount, changeCount)
                 filesInfo[directory] = FileNodeDescriptor(
-                    path = directory,
                     changeCount = changeCount,
                 )
             }