Remove Java version evaluation

According to JEP223, Java versions do not include trailing zero
elements. This means that e.g. Java 14.0.0 reports its version just as
"14". The changed code part expected at least three characters, so it
failed to start on such "zero-zero" Java releases. The evaluated java
version was not used anywhere, so the code block was removed.

Author: shred

arduino-core/src/processing/app/legacy/PApplet.java

@@ -16,27 +16,6 @@ public class PApplet {
   /** Path to sketch folder */
   public String sketchPath; //folder;
 
-  /**
-   * Full name of the Java version (i.e. 1.5.0_11).
-   * Prior to 0125, this was only the first three digits.
-   */
-  public static final String javaVersionName =
-    System.getProperty("java.version");
-
-  /**
-   * Version of Java that's in use, whether 1.1 or 1.3 or whatever,
-   * stored as a float.
-   * <P>
-   * Note that because this is stored as a float, the values may
-   * not be <EM>exactly</EM> 1.3 or 1.4. Instead, make sure you're
-   * comparing against 1.3f or 1.4f, which will have the same amount
-   * of error (i.e. 1.40000001). This could just be a double, but
-   * since Processing only uses floats, it's safer for this to be a float
-   * because there's no good way to specify a double with the preproc.
-   */
-  public static final float javaVersion =
-    new Float(javaVersionName.substring(0, 3)).floatValue();
-
   /**
    * Current platform in use, one of the
    * PConstants WINDOWS, MACOSX, MACOS9, LINUX or OTHER.