The default of EXTRA_OEMAKE is already empty since commit:
OE-Core rev: aeb653861a0ec39ea7a014c0622980edcbf653fa
bitbake.conf: Remove unhelpful default value for EXTRA_OEMAKE
(From OE-Core rev: 4c1d679a0fd601ba37ab37b11f660cc41d8507ff)
Signed-off-by: Stefan Müller-Klieser <s.mueller-klieser@phytec.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>