Remove APIs deprecated since 0.11 from REEF Bridge

lang/java/reef-bridge-java/src/main/java/org/apache/reef/javabridge/LibLoader.java:135:  @Deprecated
lang/java/reef-bridge-java/src/main/java/org/apache/reef/javabridge/LibLoader.java-136-  private void loadBridgeDLLFromJAR() throws IOException {
lang/java/reef-bridge-java/src/main/java/org/apache/reef/javabridge/LibLoader.java-137-    final String tempLoadDir = System.getProperty(USER_DIR) + this.reefFileNames.getLoadDir();
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lang/java/reef-bridge-java/src/main/java/org/apache/reef/javabridge/LibLoader.java:184:  @Deprecated
lang/java/reef-bridge-java/src/main/java/org/apache/reef/javabridge/LibLoader.java-185-  private void loadFromReefJar(String name, final boolean managed) throws IOException {
lang/java/reef-bridge-java/src/main/java/org/apache/reef/javabridge/LibLoader.java-186-    LOG.log(Level.SEVERE, "Consider upgrading your REEF client. Loading DLLs from the JAR is deprecated.");
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