build: Remove some unused code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142398 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.config.in b/Makefile.config.in
index 9755a5d..3961cc9 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -86,8 +86,6 @@
 endif
 endif
 
-LLVMMAKE := $(LLVM_SRC_ROOT)/make
-
 PROJ_bindir     := $(PROJ_prefix)/bin
 PROJ_libdir     := $(PROJ_prefix)/lib
 PROJ_datadir    := $(PROJ_prefix)/share