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

Co-authored-by: Christian Fersch <Chronial@gmail.com>
diff --git a/absl/copts/AbseilConfigureCopts.cmake b/absl/copts/AbseilConfigureCopts.cmake
index 90a1449..9cd6fd1 100644
--- a/absl/copts/AbseilConfigureCopts.cmake
+++ b/absl/copts/AbseilConfigureCopts.cmake
@@ -41,7 +41,6 @@
     # 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}")