omap2+: Remove useless Makefile line

Merge commit 952414505f55afe5cd6dc004765076aa22b3ed7e ("Merge branch
'next/cleanup' of git://git.linaro.org/people/arnd/arm-soc") added
references to CONFIG_MACH_PCM049 and board-omap4pcm049.o to this
Makefile. But there's no Kconfig symbol MACH_PCM049 and there's no file
board-omap4pcm049.c. This line can safely be removed.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/Makefile

@@ -254,8 +254,6 @@ obj-$(CONFIG_MACH_TOUCHBOOK)		+= board-omap3touchbook.o
 obj-$(CONFIG_MACH_OMAP_4430SDP)		+= board-4430sdp.o
 obj-$(CONFIG_MACH_OMAP4_PANDA)		+= board-omap4panda.o
 
-obj-$(CONFIG_MACH_PCM049)		+= board-omap4pcm049.o
-
 obj-$(CONFIG_MACH_OMAP3517EVM)		+= board-am3517evm.o
 
 obj-$(CONFIG_MACH_CRANEBOARD)		+= board-am3517crane.o