Removed unnecessary disabling of Jack

The annotation processor only works on host at the moment and as
Jack is not used for the host build disabling jack, using
  LOCAL_JAVA_ENABLED := disabled
is unnecessary so any references to it will be removed.

Change-Id: I950ae221173dfe6fa6ae98d73cda6b98dcf07943
diff --git a/Android.mk b/Android.mk
index 08419f0..cc57c5f 100644
--- a/Android.mk
+++ b/Android.mk
@@ -28,7 +28,6 @@
   dagger2-inject-host \
   guavalib
 
-#LOCAL_JACK_ENABLED := disabled
 include $(BUILD_HOST_JAVA_LIBRARY)
 
 # build dagger2 producers host jar
diff --git a/java_annotation_processors.mk b/java_annotation_processors.mk
index 18ef29b..22ff020 100644
--- a/java_annotation_processors.mk
+++ b/java_annotation_processors.mk
@@ -59,8 +59,6 @@
 $(GENERATED_SOURCE_DIR):
 	mkdir -p $@
 
-LOCAL_JACK_ENABLED := disabled
-
 # Clean up all the extra variables to make sure that they don't escape to
 # another module.
 PROCESSOR_LIBRARIES :=