diff --git a/cc/toolchains/action_type_config.bzl b/cc/toolchains/action_type_config.bzl
index fa2fc50..4752ac2 100644
--- a/cc/toolchains/action_type_config.bzl
+++ b/cc/toolchains/action_type_config.bzl
@@ -17,7 +17,6 @@ load(
     "//cc/toolchains/impl:collect.bzl",
     "collect_action_types",
     "collect_features",
-    "collect_files",
     "collect_tools",
 )
 load(
@@ -36,7 +35,6 @@ def _cc_action_type_config_impl(ctx):
 
     tools = tuple(collect_tools(ctx, ctx.attr.tools))
     implies = collect_features(ctx.attr.implies)
-    files = collect_files(ctx.attr.data)
 
     configs = {}
     for action_type in collect_action_types(ctx.attr.action_types).to_list():
@@ -45,9 +43,7 @@ def _cc_action_type_config_impl(ctx):
             action_type = action_type,
             tools = tools,
             implies = implies,
-            files = ctx.runfiles(
-                transitive_files = depset(transitive = [files]),
-            ).merge_all([tool.runfiles for tool in tools]),
+            files = ctx.runfiles().merge_all([tool.runfiles for tool in tools]),
         )
 
     return [ActionTypeConfigSetInfo(label = ctx.label, configs = configs)]
@@ -80,14 +76,6 @@ satisfy the currently enabled feature set is used.
             providers = [FeatureSetInfo],
             doc = "Features that should be enabled when this action is used.",
         ),
-        "data": attr.label_list(
-            allow_files = True,
-            doc = """Files required for this action type.
-
-For example, the c-compile action type might add the C standard library header
-files from the sysroot.
-""",
-        ),
     },
     provides = [ActionTypeConfigSetInfo],
     doc = """Declares the configuration and selection of `cc_tool` rules.
diff --git a/tests/rule_based_toolchain/action_type_config/BUILD b/tests/rule_based_toolchain/action_type_config/BUILD
index 689babd..3c44113 100644
--- a/tests/rule_based_toolchain/action_type_config/BUILD
+++ b/tests/rule_based_toolchain/action_type_config/BUILD
@@ -7,9 +7,6 @@ util.helper_target(
     cc_action_type_config,
     name = "file_map",
     action_types = ["//tests/rule_based_toolchain/actions:all_compile"],
-    data = [
-        "//tests/rule_based_toolchain/testdata:multiple2",
-    ],
     tools = [
         "//tests/rule_based_toolchain/testdata:bin_wrapper.sh",
         "//tests/rule_based_toolchain/tool:wrapped_tool",
diff --git a/tests/rule_based_toolchain/action_type_config/action_type_config_test.bzl b/tests/rule_based_toolchain/action_type_config/action_type_config_test.bzl
index bbb5de4..3394ee2 100644
--- a/tests/rule_based_toolchain/action_type_config/action_type_config_test.bzl
+++ b/tests/rule_based_toolchain/action_type_config/action_type_config_test.bzl
@@ -28,19 +28,16 @@ _TOOL_FILES = [
     "tests/rule_based_toolchain/testdata/bin_wrapper",
     "tests/rule_based_toolchain/testdata/bin_wrapper.sh",
 ]
-_ADDITIONAL_FILES = [
-    "tests/rule_based_toolchain/testdata/multiple2",
-]
 
 collect_action_type_configs = result_fn_wrapper(_collect_action_type_configs)
 
 def _files_taken_test(env, targets):
     configs = env.expect.that_target(targets.file_map).provider(ActionTypeConfigSetInfo).configs()
     c_compile = configs.get(targets.c_compile[ActionTypeInfo])
-    c_compile.files().contains_exactly(_TOOL_FILES + _ADDITIONAL_FILES)
+    c_compile.files().contains_exactly(_TOOL_FILES)
 
     cpp_compile = configs.get(targets.cpp_compile[ActionTypeInfo])
-    cpp_compile.files().contains_exactly(_TOOL_FILES + _ADDITIONAL_FILES)
+    cpp_compile.files().contains_exactly(_TOOL_FILES)
 
 def _merge_distinct_configs_succeeds_test(env, targets):
     configs = env.expect.that_value(