Removed log4j

Fix #11727

Author: cmaglie

app/.classpath

@@ -38,8 +38,6 @@
 	<classpathentry kind="lib" path="lib/jmdns-3.5.5.jar"/>
 	<classpathentry kind="lib" path="lib/slf4j-api-1.7.22.jar"/>
 	<classpathentry kind="lib" path="lib/slf4j-simple-1.7.22.jar"/>
-	<classpathentry kind="lib" path="lib/log4j-api-2.16.0.jar"/>
-	<classpathentry kind="lib" path="lib/log4j-core-2.16.0.jar"/>
 	<classpathentry kind="lib" path="lib/jsch-0.1.50.jar"/>
 	<classpathentry kind="lib" path="lib/rsyntaxtextarea-3.0.3-SNAPSHOT.jar"/>
 	<classpathentry kind="lib" path="lib/xml-apis-1.3.04.jar"/>

app/build.xml

@@ -80,10 +80,6 @@
 	   includeAntRuntime="false"
 	   debug="true"
 	   classpathref="class.path" />
-    <!-- If you want to add files in the jars -->
-    <copy todir="bin" overwrite="true" verbose="true">
-      <fileset dir="src" includes="log4j2.xml" />
-    </copy>
   </target>
 
   <target name="test" depends="compile" description="Runs the test">

app/lib/log4j-api-2.16.0.jar

@@ -35,7 +35,6 @@
 import cc.arduino.contributions.packages.ContributionInstaller;
 import cc.arduino.contributions.packages.filters.UpdatablePlatformPredicate;
 import cc.arduino.view.NotificationPopup;
-import org.apache.logging.log4j.LogManager;
 import processing.app.*;
 
 import javax.swing.*;
@@ -160,12 +159,14 @@ public void windowGainedFocus(WindowEvent evt) {
 
   private void goToManager(String link) {
     try {
-      ((UpdatableBoardsLibsFakeURLsHandler) hyperlinkListener).openBoardLibManager(new URL(link));
-    }
-      catch (Exception e){
-        LogManager.getLogger(ContributionsSelfCheck.class).warn("Exception while attempting to go to board manager", e);
+      ((UpdatableBoardsLibsFakeURLsHandler) hyperlinkListener)
+          .openBoardLibManager(new URL(link));
+    } catch (Exception e) {
+      System.err.println("Error while attempting to open board manager: "
+                         + e.getMessage());
     }
   }
+
   // callback for boards button
   public void onOptionalButton1Callback() {
     goToManager(boardsManagerURL);

app/lib/log4j-core-2.16.0.jar

@@ -220,12 +220,6 @@ public Base(String[] args) throws Exception {
     parser.parseArgumentsPhase1();
     commandLine = !parser.isGuiMode();
 
-    // This configure the logs root folder
-    if (parser.isGuiMode()) {
-        System.out.println("Set log4j store directory " + BaseNoGui.getSettingsFolder().getAbsolutePath());
-    }
-    System.setProperty("log4j.dir", BaseNoGui.getSettingsFolder().getAbsolutePath());
-
     BaseNoGui.checkInstallationFolder();
 
     // If no path is set, get the default sketchbook folder for this platform

app/src/cc/arduino/contributions/ContributionsSelfCheck.java

@@ -8,8 +8,6 @@
 	<classpathentry kind="lib" path="lib/jmdns-3.5.5.jar"/>
 	<classpathentry kind="lib" path="lib/slf4j-api-1.7.22.jar"/>
 	<classpathentry kind="lib" path="lib/slf4j-simple-1.7.22.jar"/>
-	<classpathentry kind="lib" path="lib/log4j-api-2.16.0.jar"/>
-	<classpathentry kind="lib" path="lib/log4j-core-2.16.0.jar"/>
 	<classpathentry kind="lib" path="lib/jsch-0.1.50.jar"/>
 	<classpathentry kind="lib" path="lib/commons-exec-1.1.jar"/>
 	<classpathentry kind="lib" path="../app/lib/commons-httpclient-3.1.jar"/>