Convert --use_action_cache to a regular option

RELNOTES: Convert --use_action_cache to a regular option

--
PiperOrigin-RevId: 148804881
MOS_MIGRATED_REVID=148804881
diff --git a/src/main/cpp/startup_options.cc b/src/main/cpp/startup_options.cc
index f7786b4..1254cc2 100644
--- a/src/main/cpp/startup_options.cc
+++ b/src/main/cpp/startup_options.cc
@@ -57,8 +57,7 @@
       invocation_policy(NULL),
       client_debug(false),
       use_custom_exit_code_on_abrupt_exit(true),
-      java_logging_formatter("java.util.logging.SimpleFormatter"),
-      use_action_cache(true) {
+      java_logging_formatter("java.util.logging.SimpleFormatter") {
   bool testing = !blaze::GetEnv("TEST_TMPDIR").empty();
   if (testing) {
     output_root = MakeAbsolute(blaze::GetEnv("TEST_TMPDIR"));
@@ -84,8 +83,7 @@
                      "write_command_log",
                      "watchfs",
                      "client_debug",
-                     "use_custom_exit_code_on_abrupt_exit",
-                     "use_action_cache"};
+                     "use_custom_exit_code_on_abrupt_exit"};
   unary_options = {"output_base", "install_base",
       "output_user_root", "host_jvm_profile", "host_javabase",
       "host_jvm_args", "bazelrc", "blazerc", "io_nice_level",
@@ -285,12 +283,6 @@
   } else if (GetNullaryOption(arg, "--nouse_custom_exit_code_on_abrupt_exit")) {
     use_custom_exit_code_on_abrupt_exit = false;
     option_sources["use_custom_exit_code_on_abrupt_exit"] = rcfile;
-  } else if (GetNullaryOption(arg, "--nouse_action_cache")) {
-    use_action_cache = false;
-    option_sources["use_action_cache"] = rcfile;
-  } else if (GetNullaryOption(arg, "--use_action_cache")) {
-    use_action_cache = true;
-    option_sources["use_action_cache"] = rcfile;
   } else if ((value = GetUnaryOption(
       arg, next_arg, "--connect_timeout_secs")) != NULL) {
     if (!blaze_util::safe_strto32(value, &connect_timeout_secs) ||