Forgot to remove emulator flag. (flutter#118762)

Author: ricardoamador

.ci.yaml

@@ -1385,7 +1385,6 @@ targets:
       tags: >
         ["devicelab" ,"android", "linux"]
       task_name: android_defines_test
-      use_emulator: "true"
 
   - name: Linux_android android_obfuscate_test
     recipe: devicelab/devicelab_drone