[apply_patch] disable default freeform tool (#2643)

## Summary
We're seeing some issues in the freeform tool - let's disable by default
until it stabilizes.

## Testing
- [x] Ran locally, confirmed codex-cli could make edits

codex-rs/core/src/model_family.rs

@@ -90,7 +90,6 @@ pub fn find_family_for_model(slug: &str) -> Option<ModelFamily> {
         model_family!(
             slug, slug,
             supports_reasoning_summaries: true,
-            apply_patch_tool_type: Some(ApplyPatchToolType::Freeform),
         )
     } else if slug.starts_with("gpt-4.1") {
         model_family!(
@@ -107,7 +106,6 @@ pub fn find_family_for_model(slug: &str) -> Option<ModelFamily> {
         model_family!(
             slug, "gpt-5",
             supports_reasoning_summaries: true,
-            apply_patch_tool_type: Some(ApplyPatchToolType::Freeform),
         )
     } else {
         None