Revert "Label provider token estimates in Codex memory settings"

This reverts commit 0fa42332c1.

apps/desktop/codex-link-control.schema.json

@@ -172,8 +172,7 @@
                 "count_method": {
                   "enum": [
                     "exact_tokenizer",
-                    "verified_upper_bound",
-                    "provider_estimate"
+                    "verified_upper_bound"
                   ]
                 }
               }
@@ -956,8 +955,7 @@
         "count_method": {
           "enum": [
             "exact_tokenizer",
-            "verified_upper_bound",
-            "provider_estimate"
+            "verified_upper_bound"
           ]
         },
         "serialization_revision": {