refactor: remove env_auto_upgrade_package_manager metric

Package manager is already tracked via env_package_manager in the
analytics layer. No need to duplicate it in auto-upgrade metrics.

Author: alfonso-noriega

packages/cli-kit/src/public/node/hooks/postrun.test.ts

@@ -113,23 +113,6 @@ describe('autoUpgradeIfNeeded', () => {
     expect(outputMock.warn()).toMatch(installReminder)
   })
 
-  test('records package_manager metric for minor/patch upgrade', async () => {
-    vi.mocked(versionToAutoUpgrade).mockReturnValue('3.100.0')
-    vi.mocked(isMajorVersionChange).mockReturnValue(false)
-    vi.mocked(inferPackageManagerForGlobalCLI).mockReturnValue('npm')
-    vi.mocked(runCLIUpgrade).mockResolvedValue(undefined)
-
-    await autoUpgradeIfNeeded()
-
-    expect(addPublicMetadata).toHaveBeenCalledWith(expect.any(Function))
-    const calls = vi.mocked(addPublicMetadata).mock.calls.map((call) => call[0]())
-    expect(calls).toContainEqual(
-      expect.objectContaining({
-        env_auto_upgrade_package_manager: 'npm',
-      }),
-    )
-  })
-
   test('records skipped_reason for major version bump', async () => {
     vi.mocked(versionToAutoUpgrade).mockReturnValue('4.0.0')
     vi.mocked(isMajorVersionChange).mockReturnValue(true)

packages/cli-kit/src/public/node/hooks/postrun.ts

@@ -69,11 +69,6 @@ async function performAutoUpgrade(newerVersion: string): Promise<void> {
     return
   }
 
-  const packageManager = inferPackageManagerForGlobalCLI()
-  await metadata.addPublicMetadata(() => ({
-    env_auto_upgrade_package_manager: packageManager,
-  }))
-
   try {
     await runCLIUpgrade()
     await metadata.addPublicMetadata(() => ({env_auto_upgrade_success: true}))

packages/cli-kit/src/public/node/monorail.ts

@@ -10,7 +10,7 @@ const url = 'https://monorail-edge.shopifysvc.com/v1/produce'
 type Optional<T> = T | null
 
 // This is the topic name of the main event we log to Monorail, the command tracker
-export const MONORAIL_COMMAND_TOPIC = 'app_cli3_command/1.20'
+export const MONORAIL_COMMAND_TOPIC = 'app_cli3_command/1.21'
 
 export interface Schemas {
   [MONORAIL_COMMAND_TOPIC]: {
@@ -66,7 +66,6 @@ export interface Schemas {
       // Auto-upgrade
       env_auto_upgrade_enabled?: Optional<boolean>
       env_auto_upgrade_accepted?: Optional<boolean>
-      env_auto_upgrade_package_manager?: Optional<string>
       env_auto_upgrade_skipped_reason?: Optional<string>
       env_auto_upgrade_success?: Optional<boolean>