Removed leftovers of `compiler_extra_includes`

toolchain/defs.bzl

@@ -250,7 +250,6 @@ def declare_files(os):
 
     for target_config in target_structs():
         all_includes = [native.glob(["lib/{}/**".format(i)]) for i in target_config.includes]
-        all_includes.append(getattr(target_config, "compiler_extra_includes", []))
 
         cxx_tool_label = ":" + zig_tool_path(os).format(
             zig_tool = "c++",

toolchain/private/cc_toolchains.bzl

@@ -33,8 +33,6 @@ def declare_cc_toolchains(os, zig_sdk_path):
         linkopts = []
         for s in getattr(target_config, "linker_version_scripts", []):
             linkopts = ["-Wl,--version-script,%s/%s" % (zig_sdk_path, s)]
-        for incl in getattr(target_config, "compiler_extra_includes", []):
-            copts = copts + ["-include", zig_sdk_path + "/" + incl]
 
         # We can't pass a list of structs to a rule, so we use json encoding.
         artifact_name_patterns = getattr(target_config, "artifact_name_patterns", [])