Remove acosx-version-min

While this was part of our original patch, it
really only helps give warning messages for
sysroot version mismatches. Remove for now since
its not really important to the core logic of the
change.

Author: mrmeku

toolchain/cc_toolchain_config.bzl

@@ -174,10 +174,7 @@ def cc_toolchain_config(
 
         ld = "ld64.lld"
         ld_path = toolchain_path_prefix + "/bin/" + ld
-        compile_flags.append("-mmacosx-version-min=12.0")
         link_flags.extend([
-            "-mmacosx-version-min=12.0",
-            "-Wl,-platform_version,macos,12.0,12.0",
             "--ld-path=" + ld_path,
             "-headerpad_max_install_names",
             "-fobjc-link-runtime",