Revert "Rename "import jet.*" to "import kotlin.*" on ant dist"

This reverts commit 4a5823c5bb.

build.xml

@@ -284,26 +284,6 @@
         <arg value="core/builtins/native"/>
         <arg value="core/builtins/src"/>
       </java>
-
-      <if>
-        <isfalse value="${bootstrap.build.no.tests}"/>
-        <then>
-          <cleandir dir="${output}/renameImportJet"/>
-          <kotlinc output="${output}/renameImportJet">
-            <src path="renameImportJet.kt"/>
-            <classpath refid="classpath"/>
-          </kotlinc>
-          <java classname="_DefaultPackage" failonerror="true" fork="true">
-            <classpath>
-              <pathelement location="${output}/renameImportJet"/>
-              <path refid="classpath"/>
-            </classpath>
-            <assertions>
-              <enable/>
-            </assertions>
-          </java>
-        </then>
-      </if>
     </target>
 
     <macrodef name="pack_compiler">

renameImportJet.kt

@@ -1,34 +0,0 @@
-import java.io.File
-import com.intellij.util.Processor
-import com.intellij.openapi.util.io.FileUtil
-import java.util.ArrayList
-
-fun main(args: Array<String>) {
-    println("renameImportJet")
-
-    fun processFile(file: File) {
-        if (!file.getName().endsWith(".java") || file.isDirectory()) return
-
-        val lines = ArrayList<String>()
-        var rewrite = false
-        file.reader().forEachLine { line ->
-            if (line.startsWith("import jet.") && !line.startsWith("import jet.runtime.typeinfo"))  {
-                lines.add("import kotlin." + line.substring("import jet.".length))
-                rewrite = true
-            }
-            else {
-                lines.add(line)
-            }
-        }
-
-        if (rewrite) {
-            println("renaming imports in $file")
-            file.writeText(lines reduce { (a, b) -> "$a\n$b" })
-        }
-    }
-
-    val processor = Processor<File> { if (it != null) processFile(it); true }
-    val directoryFilter = Processor<File> { it?.getName() != "testData" }
-
-    FileUtil.processFilesRecursively(File("."), processor, directoryFilter)
-}