Remove `reboot emergency`.

This isn't in the bootloader requirements doc, and the internet implies
that you actually need to use `fastboot oem edl` or `fastboot oem
reboot-edl` anyway.

Bug: N/A
Test: N/A
Change-Id: I0b7cd9839fbd06fc104d029e92d5986dc3c6eda3
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index 091b117..ee92e99 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -1451,7 +1451,6 @@
     bool wants_wipe = false;
     bool wants_reboot = false;
     bool wants_reboot_bootloader = false;
-    bool wants_reboot_emergency = false;
     bool skip_reboot = false;
     bool wants_set_active = false;
     bool skip_secondary = false;
@@ -1693,9 +1692,6 @@
                 if (what == "bootloader") {
                     wants_reboot = false;
                     wants_reboot_bootloader = true;
-                } else if (what == "emergency") {
-                    wants_reboot = false;
-                    wants_reboot_emergency = true;
                 } else {
                     syntax_error("unknown reboot target %s", what.c_str());
                 }
@@ -1837,9 +1833,6 @@
     } else if (wants_reboot_bootloader) {
         fb_queue_command("reboot-bootloader", "rebooting into bootloader");
         fb_queue_wait_for_disconnect();
-    } else if (wants_reboot_emergency) {
-        fb_queue_command("reboot-emergency", "rebooting into emergency download (EDL) mode");
-        fb_queue_wait_for_disconnect();
     }
 
     int status = fb_execute_queue(transport) ? EXIT_FAILURE : EXIT_SUCCESS;