test(composition): remove retired image-region tool

apps/cli/tests/web-agent-presets.e2e.ts

@@ -237,7 +237,7 @@ describe('the shipped Web composition', () => {
       // depend on ripgrep being present on the machine.
       expect(toolNames(ctx, handle.agent).filter(name => name !== 'glob' && name !== 'grep')).toEqual([
         'ask_user_question', 'bash', 'create_goal', 'edit', 'exit_plan_mode',
-        'get_goal', 'interrupt_agent', 'job_kill', 'job_list', 'job_output', 'list_agents', 'ralph', 'read', 'read_image', 'read_image_region', 'send_message', 'skill',
+        'get_goal', 'interrupt_agent', 'job_kill', 'job_list', 'job_output', 'list_agents', 'ralph', 'read', 'read_image', 'send_message', 'skill',
         'subagent', 'subagent_fork', 'todo_write', 'update_goal', 'web_search',
         'workflow', 'write',
       ])

apps/web/tests/shipped-composition.e2e.ts

@@ -48,7 +48,6 @@ const EXPECTED_TOOLS = [
   'ralph',
   'read',
   'read_image',
-  'read_image_region',
   'send_message',
   'skill',
   'subagent',