[OpenMP] remove obsolete symbol defintions

[vadikp-intel]

Summary

Some globals were used for enforcing certain linking rules in the Intel OpenMP implementation's MSVC compatibility layer and are not applicable to the LLVM implementation (kmp_import.cpp has already been removed from the build).

openmp/runtime/src/dllexports

%ifdef KMP_DEBUG
         __kmp_printf
     %endif
 
     %ifdef USE_DEBUGGER
         __kmp_debugging                         DATA
         __kmp_omp_debug_struct_info             DATA
     %endif
 
-    # Symbols for MS mutual detection:
-    _You_must_link_with_exactly_one_OpenMP_library    DATA
-    _You_must_link_with_Intel_OpenMP_library          DATA
     __kmp_wait_64
     __kmp_release_64
 
 #    VT_getthid                              1
 #    vtgthid                                 2
 
     __kmpc_atomic_4                         100
     __kmpc_atomic_8                         101

openmp/runtime/src/kmp.h

 KMP_EXPORT void __kmpc_doacross_post(ident_t *loc, kmp_int32 gtid,
                                      const kmp_int64 *vec);
 KMP_EXPORT void __kmpc_doacross_fini(ident_t *loc, kmp_int32 gtid);
 
 KMP_EXPORT void *__kmpc_threadprivate_cached(ident_t *loc, kmp_int32 global_tid,
                                              void *data, size_t size,
                                              void ***cache);
 
-// Symbols for MS mutual detection.
-extern int _You_must_link_with_exactly_one_OpenMP_library;
-extern int _You_must_link_with_Intel_OpenMP_library;
-#if KMP_OS_WINDOWS && (KMP_VERSION_MAJOR > 4)
-extern int _You_must_link_with_Microsoft_OpenMP_library;
-#endif
-
 // The routines below are not exported.
 // Consider making them 'static' in corresponding source files.
 void kmp_threadprivate_insert_private_data(int gtid, void *pc_addr,
                                            void *data_addr, size_t pc_size);
 struct private_common *kmp_threadprivate_insert(int gtid, void *pc_addr,
                                                 void *data_addr,
                                                 size_t pc_size);
 void __kmp_threadprivate_resize_cache(int newCapacity);

openmp/runtime/src/kmp_global.cpp

 int get_suspend_count_(void) {
   int count = __kmp_suspend_count;
   __kmp_suspend_count = 0;
   return count;
 }
 void set_suspend_count_(int *value) { __kmp_suspend_count = *value; }
 #endif
 
-// Symbols for MS mutual detection.
-int _You_must_link_with_exactly_one_OpenMP_library = 1;
-int _You_must_link_with_Intel_OpenMP_library = 1;
-#if KMP_OS_WINDOWS && (KMP_VERSION_MAJOR > 4)
-int _You_must_link_with_Microsoft_OpenMP_library = 1;
-#endif
-
 kmp_target_offload_kind_t __kmp_target_offload = tgt_default;
 
 // OMP Pause Resources
 kmp_pause_status_t __kmp_pause_status = kmp_not_paused;
 
 // Nesting mode
 int __kmp_nesting_mode = 0;
 int __kmp_nesting_mode_nlevels = 1;
 int *__kmp_nesting_nth_level;
 
 // end of file //

openmp/runtime/src/kmp_import.cpp

-/*
- * kmp_import.cpp
- */
-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-/* Object generated from this source file is linked to Windows* OS DLL import
-   library (libompmd.lib) only! It is not a part of regular static or dynamic
-   OpenMP RTL. Any code that just needs to go in the libompmd.lib (but not in
-   libompmt.lib and libompmd.dll) should be placed in this file. */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/*These symbols are required for mutual exclusion with Microsoft OpenMP RTL
-  (and compatibility with MS Compiler). */
-
-int _You_must_link_with_exactly_one_OpenMP_library = 1;
-int _You_must_link_with_Intel_OpenMP_library = 1;
-int _You_must_link_with_Microsoft_OpenMP_library = 1;
-
-#ifdef __cplusplus
-}
-#endif
-
-// end of file //