build scripts: don't add Kotlin JARs to classpath in gant.xml

This may lead to problems if Kotlin is updated to a new version inside a build script, so it'll remove the old JARs and add a new ones. We add Kotlin JARs to classpath in CompilationTasksImpl.ensureKotlinCompilerAddedToClassPath anyway.

build/gant.xml

@@ -1,6 +1,5 @@
 <project name="Test gant invocation from Ant script" default="doGant" xmlns:if="ant:if">
   <dirname property="build.dir" file="${ant.file}"/>
-  <property name="include.kotlin.jars.to.classpath" value="true"/>
   <property name="project.home" value="${build.dir}/.."/>
   <property name="gant.home" value="${project.home}/build/lib/gant"/>
   <property name="idea.lib" value="${project.home}/lib"/>
@@ -21,16 +20,6 @@
     <pathelement path="${project.home}/platform/build-scripts/groovy"/>
     <pathelement path="${project.home}/build/groovy"/>
     <fileset file="${project.home}/jps/lib/optimizedFileManager.jar"/>
-    <fileset dir="${project.home}/build/dependencies/build/Kotlin/lib/jps" erroronmissingdir="false" if:true="${include.kotlin.jars.to.classpath}">
-      <include name="*.jar"/>
-    </fileset>
-    <fileset dir="${project.home}/build/dependencies/build/Kotlin/kotlinc/lib" erroronmissingdir="false" if:true="${include.kotlin.jars.to.classpath}">
-      <include name="kotlin-runtime.jar"/>
-      <include name="kotlin-reflect.jar"/>
-    </fileset>
-    <fileset dir="${project.home}/build/dependencies/build/Kotlin/lib" erroronmissingdir="false" if:true="${include.kotlin.jars.to.classpath}">
-      <include name="kotlin-plugin.jar"/>
-    </fileset>
     <fileset dir="${idea.lib}">
        <include name="jdom.jar"/>
        <include name="log4j.jar"/>