[lld-macho] Remove old macho darwin lld

During the llvm round table it was generally agreed that the newer macho
lld implementation is feature complete enough to replace the old
implementation entirely. This will reduce confusion for new users who
aren't aware of the history.

Differential Revision: https://reviews.llvm.org/D114842

Author: keith

lld/CMakeLists.txt

@@ -195,12 +195,10 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
 endif()
 
 add_subdirectory(Common)
-add_subdirectory(lib)
 add_subdirectory(tools/lld)
 
 if (LLVM_INCLUDE_TESTS)
   add_subdirectory(test)
-  add_subdirectory(unittests)
 endif()
 
 add_subdirectory(docs)

lld/include/lld/Common/Driver.h

@@ -42,11 +42,6 @@ bool link(llvm::ArrayRef<const char *> args, bool canExitEarly,
           llvm::raw_ostream &stdoutOS, llvm::raw_ostream &stderrOS);
 }
 
-namespace mach_o {
-bool link(llvm::ArrayRef<const char *> args, bool canExitEarly,
-          llvm::raw_ostream &stdoutOS, llvm::raw_ostream &stderrOS);
-}
-
 namespace macho {
 bool link(llvm::ArrayRef<const char *> args, bool canExitEarly,
           llvm::raw_ostream &stdoutOS, llvm::raw_ostream &stderrOS);

lld/include/lld/Core/Reference.h

@@ -42,9 +42,8 @@ class Reference {
 public:
   /// Which universe defines the kindValue().
   enum class KindNamespace {
-    all     = 0,
+    all = 0,
     testing = 1,
-    mach_o  = 2,
   };
 
   KindNamespace kindNamespace() const { return (KindNamespace)_kindNamespace; }