test: remove unneeded bazel tsetse configuration

Remove outdated `@bazel/tsetse` plugin configuration from test TS configuration.
With the `rules_js` migration, `@bazel/tsetse` is no longer used.

Author: clydin

tsconfig-test.json

@@ -7,13 +7,6 @@
     // Istanbul (not Constantinople) as well, and applying both source maps to get the original
     // source in devtools.
     "inlineSources": true,
-    "types": ["node", "jasmine"],
-    "plugins": [
-      {
-        "name": "@bazel/tsetse",
-        // TODO: Cleanup tests and remove this rule disable
-        "disabledRules": ["must-type-assert-json-parse"]
-      }
-    ]
+    "types": ["node", "jasmine"]
   }
 }