python-pyyaml: remove unneeded bbappend

meta-oe subtree's recipe already contains the BBCLASSEXTEND.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ic03ea05a3a0e0e3b45aa09d6e04feebc417ce1f6
diff --git a/recipes-devtools/python/python-pyyaml_%.bbappend b/recipes-devtools/python/python-pyyaml_%.bbappend
deleted file mode 100644
index 2a59083..0000000
--- a/recipes-devtools/python/python-pyyaml_%.bbappend
+++ /dev/null
@@ -1 +0,0 @@
-BBCLASSEXTEND += "nativesdk"