shared.bazelrc: unblock config=remote (#11600)

Adding a MacOS-only linkopt will break when we try to use Linux
exec+target via RBE.

Remove these flags for now with a TODO to add this into the
toolchain level later.

Author: sluongng

shared.bazelrc

@@ -164,8 +164,12 @@ common:macos --macos_minimum_os=12.0
 common:macos --host_macos_minimum_os=12.0
 
 # Silence noise about -lm -lm which has no functional downside
-common:macos --linkopt=-Wl,-no_warn_duplicate_libraries
-common:macos --host_linkopt=-Wl,-no_warn_duplicate_libraries
+#
+# TODO(sluongng): Note that adding linkopt here will break --config=remote since
+# we will use Linux exec and target under that config. We should find a better way
+# to add this flag into the toolchain level.
+# common:macos --linkopt=-Wl,-no_warn_duplicate_libraries
+# common:macos --host_linkopt=-Wl,-no_warn_duplicate_libraries
 
 ########################
 # BES + CACHE + REMOTE #