Move test utility functions to a common place.

src/platform/vboot_reference/tests/verify_firmware_fuzz_driver.c

Index: src/platform/vboot_reference/tests/verify_firmware_fuzz_driver.c
diff --git a/src/platform/vboot_reference/tests/verify_firmware_fuzz_driver.c b/src/platform/vboot_reference/tests/verify_firmware_fuzz_driver.c
index 224fdb585f64cd9306a6076cc100e3ee7db573f3..8ab33ad685c0f9cd8cd1221880a54600241fc64d 100644
--- a/src/platform/vboot_reference/tests/verify_firmware_fuzz_driver.c
+++ b/src/platform/vboot_reference/tests/verify_firmware_fuzz_driver.c
@@ -28,8 +28,7 @@ int VerifySignedFirmware(const char* image_file,
     error_code = 1;
   }
 
-  if (!error_code && (error = VerifyFirmware(root_key_blob, firmware_blob,
-                                             0))) { /* Trusted Mode. */
+  if (!error_code && (error = VerifyFirmware(root_key_blob, firmware_blob))) {
     fprintf(stderr, "%s\n", VerifyFirmwareErrorString(error));
     error_code = 1;
   }