Drop PRIORITY variable

As discussed on the mailing list, this variable isn't useful and if wanted
would be better implemented by distros using pn-X overrides.

This patch executes:

find . -regex ".*\.\(bb\|inc\)$" | xargs sed -i '/^PRIORITY = ".*"$/d'

against the tree removing the referenced. Thanks to Phil Blundell for
the command.

(From OE-Core rev: d122343362669c683acc4af295971a62cbc823fc)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/patch/patch.inc

@@ -2,7 +2,6 @@ SUMMARY = "Tool for applying a patch file"
 DESCRIPTION = "patch takes a patch file containing a difference listing \
 produced by the diff program and applies those differences to one or more \
 original files, producing patched versions."
-PRIORITY = "standard"
 SECTION = "utils"
 
 SRC_URI = "${GNU_MIRROR}/patch/patch-${PV}.tar.gz"