boost-url: remove meta-phosphor append

No longer needed as it's built into boost now

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I2f9b58f9eccc661b6dd893d0387352361bbdb7db
diff --git a/meta-phosphor/recipes-support/boost-url/boost-url_%.bbappend b/meta-phosphor/recipes-support/boost-url/boost-url_%.bbappend
deleted file mode 100644
index 618170e..0000000
--- a/meta-phosphor/recipes-support/boost-url/boost-url_%.bbappend
+++ /dev/null
@@ -1 +0,0 @@
-EXTRA_OECMAKE:append:openbmc-phosphor = "-DBOOST_URL_STANDALONE=ON"