chore(features) rm Feature::ApplyPatchFreeform (#22711)

## Summary
Removes the feature since this is effectively on by default in all cases
where we should use it, or can be configured via models.json.

## Testing
- [x] unit tests pass

codex-rs/tools/src/tool_config.rs

@@ -175,7 +175,6 @@ impl ToolsConfig {
             session_source,
             ..
         } = params;
-        let include_apply_patch_tool = features.enabled(Feature::ApplyPatchFreeform);
         let include_code_mode = features.enabled(Feature::CodeMode);
         let include_code_mode_only = include_code_mode && features.enabled(Feature::CodeModeOnly);
         let include_goal_tools = features.enabled(Feature::Goals);
@@ -225,10 +224,7 @@ impl ToolsConfig {
             model_shell_type
         };
 
-        let apply_patch_tool_type = model_info
-            .apply_patch_tool_type
-            .clone()
-            .or_else(|| include_apply_patch_tool.then_some(ApplyPatchToolType::Freeform));
+        let apply_patch_tool_type = model_info.apply_patch_tool_type.clone();
 
         let agent_jobs_worker_tools = include_agent_jobs
             && matches!(

codex-rs/tools/src/tool_config_tests.rs

@@ -4,7 +4,6 @@ use codex_features::Features;
 use codex_protocol::config_types::WebSearchMode;
 use codex_protocol::config_types::WindowsSandboxLevel;
 use codex_protocol::models::PermissionProfile;
-use codex_protocol::openai_models::ApplyPatchToolType;
 use codex_protocol::openai_models::ConfigShellToolType;
 use codex_protocol::openai_models::InputModality;
 use codex_protocol::openai_models::ModelInfo;
@@ -156,7 +155,7 @@ fn shell_zsh_fork_prefers_shell_command_over_unified_exec() {
 }
 
 #[test]
-fn fallback_apply_patch_models_use_freeform_tool_by_default() {
+fn fallback_apply_patch_models_do_not_use_freeform_tool_by_default() {
     let model_info = model_info();
     let features = Features::with_defaults();
 
@@ -172,10 +171,7 @@ fn fallback_apply_patch_models_use_freeform_tool_by_default() {
         windows_sandbox_level: WindowsSandboxLevel::Disabled,
     });
 
-    assert_eq!(
-        tools_config.apply_patch_tool_type,
-        Some(ApplyPatchToolType::Freeform)
-    );
+    assert_eq!(tools_config.apply_patch_tool_type, None);
 }
 
 #[test]