Revert "dsymutil: Re-add missing -latomic (#85380)"

This reverts commit 23616c6
because it breaks Fuchsia Clang toolchain builders.
https://luci-milo.appspot.com/ui/p/fuchsia/builders/toolchain.ci/clang-linux-x64/b8751656876289840849/overview

Author: gulfemsavrun

llvm/tools/dsymutil/CMakeLists.txt

@@ -44,4 +44,4 @@ if(APPLE AND NOT LLVM_TOOL_LLVM_DRIVER_BUILD)
   target_link_libraries(dsymutil PRIVATE "-framework CoreFoundation")
 endif(APPLE AND NOT LLVM_TOOL_LLVM_DRIVER_BUILD)
 
-target_link_libraries(dsymutil PRIVATE ${LLVM_ATOMIC_LIB})
+# target_link_libraries(dsymutil PRIVATE ${LLVM_ATOMIC_LIB})