diff --git a/platform/lang-impl/src/com/intellij/util/indexing/diagnostic/dump/output/PrettyWriter.kt b/platform/lang-impl/src/com/intellij/util/indexing/diagnostic/dump/output/PrettyWriter.kt
deleted file mode 100644
index 019a6a2294b0..000000000000
--- a/platform/lang-impl/src/com/intellij/util/indexing/diagnostic/dump/output/PrettyWriter.kt
+++ /dev/null
@@ -1,32 +0,0 @@
-package com.intellij.util.indexing.diagnostic.dump.output
-
-import java.io.PrintStream
-
-class PrettyWriter(private val out: PrintStream) : AutoCloseable {
-
-  private var indent = ""
-
-  inner class Object {
-    fun writeString(s: String) {
-      s.lineSequence().forEach {
-        out.println("$indent$it")
-      }
-    }
-  }
-
-  fun writeObject(name: String, block: Object.() -> Unit) {
-    out.println("$indent$name")
-    indent += "  "
-    val obj = Object()
-    try {
-      obj.block()
-    }
-    finally {
-      indent = indent.removeSuffix("  ")
-    }
-  }
-
-  override fun close() {
-    out.close()
-  }
-}
\ No newline at end of file