Fixed a bunch of simple warnings in java code

Author: cmaglie

app/src/processing/app/syntax/SyntaxUtilities.java

@@ -131,7 +131,6 @@ public static int paintSyntaxLine(Segment line, Token tokens,
     Font defaultFont = gfx.getFont();
     Color defaultColor = gfx.getColor();
 
-    int offset = 0;
     for(;;)
       {
         byte id = tokens.id;
@@ -155,7 +154,6 @@ public static int paintSyntaxLine(Segment line, Token tokens,
         else
           x = Utilities.drawTabbedText(line, x, y, gfx, expander, 0);        
         line.offset += length;
-        offset += length;
 
         tokens = tokens.next;
       }

app/src/processing/app/tools/AutoFormat.java

@@ -639,7 +639,6 @@ public void run() {
         case '\'':
           string[j++] = c;
           cc = getchr();
-          int count = 0;
           while(cc != c && EOF == 0)
           {
             // max. length of line should be 256

app/src/processing/app/tools/MenuScroller.java

@@ -3,7 +3,6 @@
  */
 package processing.app.tools;
 
-import java.awt.BorderLayout;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Dimension;

app/test/processing/app/ReplacingTextGeneratesTwoUndoActionsTest.java

@@ -3,7 +3,6 @@
 import org.fest.swing.fixture.JMenuItemFixture;
 import org.junit.Test;
 import processing.app.helpers.JEditTextAreaFixture;
-import processing.app.syntax.JEditTextArea;
 
 import static org.junit.Assert.assertEquals;
 

arduino-core/src/processing/app/windows/Options.java

@@ -18,6 +18,7 @@
  * @author TB
  */
 public interface Options {
+  @SuppressWarnings("serial")
   Map<String, Object> UNICODE_OPTIONS = new HashMap<String, Object>() {
     {
       put(OPTION_TYPE_MAPPER, W32APITypeMapper.UNICODE);