base.bbclass: drop legacy armv7a-vfp-neon TUNE_PKGARCH renaming

ARM specific TUNE_PKGARCH renaming was adding in 2011 handle the
transition from armv7a -> armv7a-vfp-neon:

  http://git.openembedded.org/openembedded-core/commit/?id=08c0b7060009113e8dffdef51ff6b9b4b7f28894

Active package feeds should now have long since updated to the new
naming. For example, Angstrom stopped using on the legacy naming in
2012:

  2e33fb5bd0

(From OE-Core rev: 0341a3c44e511d3246096edd3009432805e57b89)

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/base.bbclass

@@ -170,12 +170,6 @@ python base_do_unpack() {
         bb.fatal(str(e))
 }
 
-def pkgarch_mapping(d):
-    # Compatibility mappings of TUNE_PKGARCH (opt in)
-    if d.getVar("PKGARCHCOMPAT_ARMV7A"):
-        if d.getVar("TUNE_PKGARCH") == "armv7a-vfp-neon":
-            d.setVar("TUNE_PKGARCH", "armv7a")
-
 def get_layers_branch_rev(d):
     layers = (d.getVar("BBLAYERS") or "").split()
     layers_branch_rev = ["%-20s = \"%s:%s\"" % (os.path.basename(i), \
@@ -228,7 +222,6 @@ python base_eventhandler() {
         if not d.getVar("NATIVELSBSTRING", False):
             d.setVar("NATIVELSBSTRING", lsb_distro_identifier(d))
         d.setVar('BB_VERSION', bb.__version__)
-        pkgarch_mapping(d)
         oe.utils.features_backfill("DISTRO_FEATURES", d)
         oe.utils.features_backfill("MACHINE_FEATURES", d)
         # Works with the line in layer.conf which changes PATH to point here