fix(core): Avoid error messages when deleting non-existent environmen…

…t variable (ScoopInstaller#5547)

* fix(core): Check if the envrionment variable exists before delete

* CHANGELOG

* Use `try, catch`, value of env variable may is null/empty

* UPDATE CHANGELOG

* Brackets

---------

Co-authored-by: Rashil Gandhi <46838874+rashil2000@users.noreply.github.com>

CHANGELOG.md

@@ -23,6 +23,7 @@
 - **install:** Fix download from private GitHub repositories ([#5361](https://github.com/ScoopInstaller/Scoop/issues/5361))
 - **scoop-info:** Fix errors in file size collection when `--verbose` ([#5352](https://github.com/ScoopInstaller/Scoop/pull/5352))
 - **shim:** Use bash executable directly ([#5433](https://github.com/ScoopInstaller/Scoop/issues/5433))
+- **core:** Avoid error messages when deleting non-existent environment variable ([#5547](https://github.com/ScoopInstaller/Scoop/issues/5547))
 - **core:** Use relative path as fallback of `$scoopdir` ([#5544](https://github.com/ScoopInstaller/Scoop/issues/5544))
 - **scoop-checkup:** Skip defender check in Windows Sandbox ([#5519](https://github.com/ScoopInstaller/Scoop/issues/5519))
 - **buckets:** Avoid error messages for unexpected dir ([#5549](https://github.com/ScoopInstaller/Scoop/issues/5549))

lib/core.ps1

@@ -751,7 +751,7 @@ function env($name, $global, $val = '__get') {
         $RegistryValueOption = [Microsoft.Win32.RegistryValueOptions]::DoNotExpandEnvironmentNames
         $EnvRegisterKey.GetValue($name, $null, $RegistryValueOption)
     } elseif ($val -eq $null) {
-        $EnvRegisterKey.DeleteValue($name)
+        try { $EnvRegisterKey.DeleteValue($name) } catch { }
         Publish-Env
     } else {
         $RegistryValueKind = if ($val.Contains('%')) {