diff --git a/samples/actions/src/META-INF/plugin.xml b/samples/actions/src/META-INF/plugin.xml
index 89b79070d4de..489749c669ee 100644
--- a/samples/actions/src/META-INF/plugin.xml
+++ b/samples/actions/src/META-INF/plugin.xml
@@ -1,4 +1,3 @@
-<!DOCTYPE idea-plugin PUBLIC "Plugin/DTD" "http://plugins.intellij.net/plugin.dtd">
 <idea-plugin>
   <!-- Plugin name -->
   <name>ActionsSample</name>
diff --git a/samples/conditionalOperatorConvertor/META-INF/plugin.xml b/samples/conditionalOperatorConvertor/META-INF/plugin.xml
index ceb6ce3046cd..e63ba2e6da1a 100644
--- a/samples/conditionalOperatorConvertor/META-INF/plugin.xml
+++ b/samples/conditionalOperatorConvertor/META-INF/plugin.xml
@@ -1,6 +1,3 @@
-<!--
-<!DOCTYPE idea-plugin PUBLIC "Plugin/DTD" "http://plugins.intellij.net/plugin.dtd">
--->
 <idea-plugin version="2">
     <name>Conditional Operator Converter</name>
     <id>ConditionalOperatorConverter</id>
diff --git a/samples/plugin/src/META-INF/plugin.xml b/samples/plugin/src/META-INF/plugin.xml
index c194183509af..031152e4f8b3 100644
--- a/samples/plugin/src/META-INF/plugin.xml
+++ b/samples/plugin/src/META-INF/plugin.xml
@@ -1,4 +1,3 @@
-<!DOCTYPE idea-plugin PUBLIC "Plugin/DTD" "http://plugins.intellij.net/plugin.dtd">
 <idea-plugin>
 <!-- plugin name -->
   <name>Sample</name>
diff --git a/samples/vfs/src/META-INF/plugin.xml b/samples/vfs/src/META-INF/plugin.xml
index ff45e7859720..a10dc993a13a 100644
--- a/samples/vfs/src/META-INF/plugin.xml
+++ b/samples/vfs/src/META-INF/plugin.xml
@@ -1,4 +1,3 @@
-<!DOCTYPE idea-plugin PUBLIC "Plugin/DTD" "http://plugins.intellij.net/plugin.dtd">
 <idea-plugin>
   <!-- Plugin name -->
   <name>VfsSample</name>