[SYCL][Driver] Remove -fsycl-esimd-build-host-code (#11211)

Remove the positive option and keep only the negative option. The option
was added only a couple of days ago and nobody should be using it. It is
a hidden option as well.

Based on feedback from
#11037 (comment)

---------

Signed-off-by: Sarnie, Nick <[email protected]>

Author: sarnex

clang/include/clang/Driver/Options.td

@@ -3641,12 +3641,9 @@ defm sycl_esimd_force_stateless_mem : BoolFOption<"sycl-esimd-force-stateless-me
     BothFlags<[], [ClangOption, CLOption, DXCOption, CC1Option], "">>;
 // TODO: Remove this option once ESIMD headers are updated to
 // guard vectors to be device only.
-defm sycl_esimd_build_host_code : BoolFOption<"sycl-esimd-build-host-code",
-    LangOpts<"SYCLESIMDBuildHostCode">, DefaultTrue,
-    PosFlag<SetTrue, [], [ClangOption], "Build the host implementation of ESIMD functions."
-            "Enabled by default.">,
-    NegFlag<SetFalse, [], [ClangOption], "Don't build the host implementation of ESIMD functions.">,
-    BothFlags<[HelpHidden], [ClangOption, CLOption, DXCOption, CC1Option], "">>;    
+def fno_sycl_esimd_build_host_code :  Flag<["-"], "fno-sycl-esimd-build-host-code">,
+  Visibility<[ClangOption, CLOption, DXCOption, CC1Option]>, Flags<[HelpHidden]>,
+  HelpText<"Don't build the host implementation of ESIMD functions.">;
 def fsycl_targets_EQ : CommaJoined<["-"], "fsycl-targets=">, Flags<[NoXarchOption]>,
   Visibility<[ClangOption, CLOption, DXCOption, CC1Option]>,
   HelpText<"Specify comma-separated list of triples SYCL offloading targets to be supported">;

clang/lib/Driver/ToolChains/Clang.cpp

@@ -5436,8 +5436,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     else {
       for (auto &Macro : D.getSYCLTargetMacroArgs())
         CmdArgs.push_back(Args.MakeArgString(Macro));
-      if (!Args.hasFlag(options::OPT_fsycl_esimd_build_host_code,
-                        options::OPT_fno_sycl_esimd_build_host_code, true))
+      if (Args.hasArg(options::OPT_fno_sycl_esimd_build_host_code))
         CmdArgs.push_back("-fno-sycl-esimd-build-host-code");
     }
     if (Args.hasFlag(options::OPT_fsycl_esimd_force_stateless_mem,