[Support] Remove llvm/Support/Host.h (#74261)

The header file has been deprecated since:

  commit f09cf34
  Author: Archibald Elliott <[email protected]>
  Date:   Tue Dec 20 10:24:02 2022 +0000

Author: kazutakahirata

llvm/include/llvm/Support/Host.h

@@ -380,9 +380,6 @@ module LLVM_Utils {
     umbrella "llvm/Support"
     module * { export * }
 
-    // Exclude this; deprecated.
-    exclude header "llvm/Support/Host.h"
-
     // Exclude this; it should only be used on Windows.
     exclude header "llvm/Support/Windows/WindowsSupport.h"
 

llvm/include/module.modulemap

@@ -47,8 +47,8 @@
 #endif
 #include <llvm/Support/raw_ostream.h>
 #include <llvm/Support/CommandLine.h>
-#include <llvm/Support/Host.h>
 #include <llvm/Support/ManagedStatic.h>
+#include <llvm/TargetParser/Host.h>
 #include <clang/AST/ASTContext.h>
 #include <clang/AST/ASTConsumer.h>
 #include <clang/Basic/Builtins.h>