Stop running checklicenses on the bots

testing/buildbot/chromium.linux.json

 {
   "Android Arm64 Builder (dbg)": {
     "additional_compile_targets": [
       "all"
     ]
   },
   "Android Builder": {
     "additional_compile_targets": [
       "cronet_test_instrumentation_apk",
       "system_webview_apk"
@@ skipping 2159 matching lines @@
           "can_use_on_swarming_builders": true
         }
       }
     ],
     "scripts": [
       {
         "name": "checkdeps",
         "script": "checkdeps.py"
       },
       {
-        "name": "checklicenses",
-        "script": "checklicenses.py"
-      },
-      {
         "name": "checkperms",
         "script": "checkperms.py"
       },
       {
         "name": "nacl_integration",
         "script": "nacl_integration.py"
       }
     ]
   },
   "Linux Tests (dbg)(1)": {
@@ skipping 742 matching lines @@
         "override_compile_targets": [
           "telemetry_unittests_run"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         }
       }
     ]
   }
 }