Remove Emscripten support

autoconf/configure.ac

Index: autoconf/configure.ac
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index fb5c4cc6d6896cc46fa13008e550993110e4e82d..229095fc9b0d12d538e827fcaf06fd2076c86fdb 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -1089,7 +1089,7 @@ if test "$llvm_cv_enable_crash_overrides" = "yes" ; then
 fi
 
 dnl List all possible targets
-ALL_TARGETS="X86 Sparc PowerPC ARM AArch64 Mips XCore MSP430 CppBackend JSBackend NVPTX Hexagon SystemZ R600"
+ALL_TARGETS="X86 Sparc PowerPC ARM AArch64 Mips XCore MSP430 CppBackend NVPTX Hexagon SystemZ R600"
 AC_SUBST(ALL_TARGETS,$ALL_TARGETS)
 
 dnl Allow specific targets to be specified for building (or not)
@@ -1120,7 +1120,6 @@ case "$enableval" in
         xcore)    TARGETS_TO_BUILD="XCore $TARGETS_TO_BUILD" ;;
         msp430)   TARGETS_TO_BUILD="MSP430 $TARGETS_TO_BUILD" ;;
         cpp)      TARGETS_TO_BUILD="CppBackend $TARGETS_TO_BUILD" ;;
-        js)       TARGETS_TO_BUILD="JSBackend $TARGETS_TO_BUILD" ;; # @LOCALMOD
         hexagon)  TARGETS_TO_BUILD="Hexagon $TARGETS_TO_BUILD" ;;
         nvptx)    TARGETS_TO_BUILD="NVPTX $TARGETS_TO_BUILD" ;;
         systemz)  TARGETS_TO_BUILD="SystemZ $TARGETS_TO_BUILD" ;;