hello-mod: drop PV and PR

* PR = "r0" is the default, no need to set it (and most people won't
  need to set it anyway with the PR service)
* PV = "0.1" is already set by virtue of 0.1 being in the filename

(From OE-Core rev: 91b323526427f67a8982c7b090e505aaf810d4e7)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-skeleton/recipes-kernel/hello-mod/hello-mod_0.1.bb

@@ -4,9 +4,6 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=12f884d2ae1ff87c09e5b7ccc2c4ca7e"
 
 inherit module
 
-PR = "r0"
-PV = "0.1"
-
 SRC_URI = "file://Makefile \
            file://hello.c \
            file://COPYING \