devel/llvm12: remove ELFv1 support

devel/llvm12/Makefile

@@ -206,10 +206,6 @@ EXTRAS_PATTERN=	${EXTRAS_COMMANDS:tW:C/  */|/g}|${EXTRAS_LIBS:tW:C/  */|/g}|${EX
 
 .include <bsd.port.options.mk>
 
-.if defined(PPC_ABI) && ${PPC_ABI} == ELFv2
-EXTRA_PATCHES=	${FILESDIR}/extra-patch-clang_lib_Driver_ToolChains_Clang.cpp
-.endif
-
 # keep in sync with /usr/src/lib/clang/clang.build.mk
 # ----------- start of sync block ------------------
 # Armv6 and armv7 uses hard float abi, unless the CPUTYPE has soft in it.