IDEA project configuration: removed unused 'xml-apis-ext' library

.idea/libraries/xml_apis_ext.xml

@@ -1,9 +0,0 @@
-<component name="libraryTable">
-  <library name="xml-apis-ext">
-    <CLASSES>
-      <root url="jar://$PROJECT_DIR$/lib/xml-apis-ext.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES />
-  </library>
-</component>

build/gant.xml

@@ -38,7 +38,6 @@
        <include name="cli-parser-*.jar"/>
        <include name="nanoxml-*.jar"/>
        <include name="xml-apis.jar"/>
-       <include name="xml-apis-ext.jar"/>
        <include name="xercesImpl.jar"/>
     </fileset>
   </path>

build/groovy/org/jetbrains/intellij/build/IntelliJCoreArtifactsBuilder.groovy

@@ -106,7 +106,6 @@ class IntelliJCoreArtifactsBuilder {
           include(name: "imgscalr-lib-4.2.jar")
           include(name: "batik-all.jar")
           include(name: "xmlgraphics-commons-1.5.jar")
-          include(name: "xml-apis-ext.jar")
         }
       }
       buildContext.notifyArtifactBuilt(coreArtifactDir)