[Java] Remove old unused code.

Author: mjpt777

sbe-tool/src/main/java/uk/co/real_logic/sbe/ir/Token.java

@@ -65,22 +65,6 @@
  */
 public class Token
 {
-    /**
-     * Indicates how the version field should be interpreted.
-     */
-    public enum VersionContext
-    {
-        /**
-         * Indicates the version is for the template itself.
-         */
-        TEMPLATE_VERSION,
-
-        /**
-         * Indicates the field was introduced since this template version.
-         */
-        SINCE_TEMPLATE_VERSION
-    }
-
     /**
      * Invalid ID value.
      */
@@ -204,10 +188,9 @@ public int id()
     }
 
     /**
-     * The version context for this token.
+     * The version context for this token. This is the schema version in which the type was introduced.
      *
-     * @return version context for this token.
-     * @see Token#versionContext()
+     * @return version for this type.
      */
     public int version()
     {
@@ -234,23 +217,6 @@ public String applicableTypeName()
         return null == referencedName ? name : referencedName;
     }
 
-    /**
-     * The context in which the version field should be interpreted.
-     *
-     * @return context in which the version field should be interpreted.
-     */
-    public VersionContext versionContext()
-    {
-        if (signal == Signal.BEGIN_MESSAGE || signal == Signal.END_MESSAGE)
-        {
-            return VersionContext.TEMPLATE_VERSION;
-        }
-        else
-        {
-            return VersionContext.SINCE_TEMPLATE_VERSION;
-        }
-    }
-
     /**
      * The encodedLength of this token in bytes.
      *