cleanup some warnings

Author: jantje

io.sloeber.core/src/io/sloeber/core/api/BoardDescription.java

@@ -119,7 +119,7 @@ public class BoardDescription extends Common {
     private boolean isDirty = true;
     private final String ENV_KEY_JANTJE_PROGRAMMER = "SLOEBER.PROGRAMMER.NAME"; //$NON-NLS-1$
     private final String ENV_KEY_JANTJE_BOARD_TXT = "SLOEBER.PRODUCT.NAME"; //$NON-NLS-1$
-    private final String ENV_KEY_JANTJE_PRODUCT_VERSION = "SLOEBER.PRODUCT.VERSION"; //$NON-NLS-1$
+
 
     @Override
     public String toString() {

io.sloeber.core/src/io/sloeber/core/api/SloeberProjectDescription.java

@@ -51,7 +51,6 @@ public class SloeberProjectDescription extends Common {
     private Map<String, BoardDescription> myBoardDescriptions = new HashMap<>();
     private Map<String, CompileDescription> myCompileDescriptions = new HashMap<>();
     private IProject myProject = null;
-    private boolean isDirty = true;
 
     private static final String ENV_KEY_BUILD_SOURCE_PATH = ERASE_START + "build.source.path"; //$NON-NLS-1$
     private static final String ENV_KEY_BUILD_GENERIC_PATH = ERASE_START + "build.generic.path"; //$NON-NLS-1$