--- a/testing/mozharness/configs/marionette/prod_config.py
+++ b/testing/mozharness/configs/marionette/prod_config.py
@@ -45,21 +45,16 @@ config = {
                 "--log-errorsummary=%(error_summary_file)s",
                 "--binary=%(binary)s",
                 "--address=%(address)s",
                 "--symbols-path=%(symbols_path)s"
             ],
             "run_filename": "",
             "testsdir": ""
         },
-        "webapi_desktop": {
-            "options": [],
-            "run_filename": "",
-            "testsdir": ""
-        },
         "webapi_emulator": {
             "options": [
                 "--log-raw=%(raw_log_file)s",
                 "--log-errorsummary=%(error_summary_file)s",
                 "--symbols-path=%(symbols_path)s",
                 "--logcat-dir=%(logcat_dir)s",
                 "--emulator=%(emulator)s",
                 "--homedir=%(homedir)s"