[WebAssembly] Remove ELF file support.

This support was partial and temporary.  Now that we have
wasm object file support its no longer needed.

Differential Revision: https://reviews.llvm.org/D48744

llvm-svn: 337222
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
index 9a5f459..7c10f02 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
@@ -97,11 +97,7 @@
                                          : "e-m:e-p:32:32-i64:64-n32:64-S128",
                         TT, CPU, FS, Options, getEffectiveRelocModel(RM),
                         CM ? *CM : CodeModel::Large, OL),
-      TLOF(TT.isOSBinFormatELF() ?
-              static_cast<TargetLoweringObjectFile*>(
-                  new WebAssemblyTargetObjectFileELF()) :
-              static_cast<TargetLoweringObjectFile*>(
-                  new WebAssemblyTargetObjectFile())) {
+      TLOF(new WebAssemblyTargetObjectFile()) {
   // WebAssembly type-checks instructions, but a noreturn function with a return
   // type that doesn't match the context will cause a check failure. So we lower
   // LLVM 'unreachable' to ISD::TRAP and then lower that to WebAssembly's
@@ -110,11 +106,9 @@
 
   // WebAssembly treats each function as an independent unit. Force
   // -ffunction-sections, effectively, so that we can emit them independently.
-  if (!TT.isOSBinFormatELF()) {
-    this->Options.FunctionSections = true;
-    this->Options.DataSections = true;
-    this->Options.UniqueSectionNames = true;
-  }
+  this->Options.FunctionSections = true;
+  this->Options.DataSections = true;
+  this->Options.UniqueSectionNames = true;
 
   initAsmInfo();