Remove useless target/device/mips

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

target/device/mips/Makefile.in

@@ -1,4 +0,0 @@
-ifneq ($(findstring y,$(BR2_mips)$(BR2_mipsel)),)
-BR2_BOARD_PATH:=target/device/mips
-BOARD_PATH:=target/device/mips
-endif