elf2flt: remove old binutils versions

toolchain/elf2flt/Makefile

@@ -9,12 +9,6 @@ include $(ADK_TOPDIR)/mk/buildhlp.mk
 ifeq ($(ADK_TOOLCHAIN_BINUTILS_GIT),y)
 BINUTILS_VERSION:=	git
 endif
-ifeq ($(ADK_TOOLCHAIN_BINUTILS_2_26_1),y)
-BINUTILS_VERSION:=	2.26.1
-endif
-ifeq ($(ADK_TOOLCHAIN_BINUTILS_2_27),y)
-BINUTILS_VERSION:=	2.27
-endif
 ifeq ($(ADK_TOOLCHAIN_BINUTILS_2_28),y)
 BINUTILS_VERSION:=	2.28
 endif