Remove Emscripten support

test/CodeGen/JS/global-alias.ll

-; RUN: llc < %s | FileCheck %s
-
-; Handle global aliases of various kinds.
-
-target datalayout = "e-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-p:32:32:32-v128:32:128-n32-S128"
-target triple = "asmjs-unknown-emscripten"
-
-@pri = internal global [60 x i8] zeroinitializer
-@pub = global [60 x i8] zeroinitializer
-
-@pri_int = internal alias [60 x i8]* @pri
-@pri_wea = weak alias [60 x i8]* @pri
-@pri_nor = alias [60 x i8]* @pri
-
-@pub_int = internal alias [60 x i8]* @pub
-@pub_wea = weak alias [60 x i8]* @pub
-@pub_nor = alias [60 x i8]* @pub
-
-; CHECK: test0(
-; CHECK: return ([[PRI:[0-9]+]]|0);
-define [60 x i8]* @test0() {
-  ret [60 x i8]* @pri
-}
-; CHECK: test1(
-; CHECK: return ([[PRI]]|0);
-define [60 x i8]* @test1() {
-  ret [60 x i8]* @pri_int
-}
-; CHECK: test2(
-; CHECK: return ([[PRI]]|0);
-define [60 x i8]* @test2() {
-  ret [60 x i8]* @pri_wea
-}
-; CHECK: test3(
-; CHECK: return ([[PRI]]|0);
-define [60 x i8]* @test3() {
-  ret [60 x i8]* @pri_nor
-}
-
-; CHECK: test4(
-; CHECK: return ([[PUB:[0-9]+]]|0);
-define [60 x i8]* @test4() {
-  ret [60 x i8]* @pub
-}
-; CHECK: test5(
-; CHECK: return ([[PUB]]|0);
-define [60 x i8]* @test5() {
-  ret [60 x i8]* @pub_int
-}
-; CHECK: test6(
-; CHECK: return ([[PUB]]|0);
-define [60 x i8]* @test6() {
-  ret [60 x i8]* @pub_wea
-}
-; CHECK: test7(
-; CHECK: return ([[PUB]]|0);
-define [60 x i8]* @test7() {
-  ret [60 x i8]* @pub_nor
-}