email: Revert workaround for error on finishing uninstall

This reverts commit 82104ccf847531944b32810f677cc6cc5c36ccc8.

Due to implementation of a proper view for showing an app with operations, this
workaround should no longer be needed. AppView should not used during or after
the uninstall step.

Tests:

- Functional tests for email pass.

- Refreshing the email app page during uninstall does not lead to an error.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/email/views.py

@@ -25,22 +25,14 @@ class EmailAppView(AppView):
     def get_context_data(self, **kwargs):
         """Add additional context data for rendering the template."""
         context = super().get_context_data(**kwargs)
-        try:  # Handle error during uninstall of app
-            context['dns_entries'] = dns.get_entries()
-        except FileNotFoundError:
-            pass
-
+        context['dns_entries'] = dns.get_entries()
         return context
 
     def get_initial(self):
         """Return the initial values to populate in the form."""
         initial = super().get_initial()
-        try:  # Handle error during uninstall of app
-            domains = privileged.domain.get_domains()
-            initial['primary_domain'] = domains['primary_domain']
-        except FileNotFoundError:
-            pass
-
+        domains = privileged.domain.get_domains()
+        initial['primary_domain'] = domains['primary_domain']
         return initial
 
     def form_valid(self, form):