Do not set mvsc linker flags for clang-cl (fixes abseil#874) (abseil#891)

Co-authored-by: Christian Fersch <[email protected]>

Author: Chronial

absl/copts/AbseilConfigureCopts.cmake

@@ -41,7 +41,6 @@ elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
     # clang-cl is half MSVC, half LLVM
     set(ABSL_DEFAULT_COPTS "${ABSL_CLANG_CL_FLAGS}")
     set(ABSL_TEST_COPTS "${ABSL_CLANG_CL_FLAGS};${ABSL_CLANG_CL_TEST_FLAGS}")
-    set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}")
   else()
     set(ABSL_DEFAULT_COPTS "${ABSL_LLVM_FLAGS}")
     set(ABSL_TEST_COPTS "${ABSL_LLVM_FLAGS};${ABSL_LLVM_TEST_FLAGS}")