Remove useless tests

These tests do not perform actual checks and do not contribute to
component quality

spec/frontend/issue_show/components/app_spec.js

@@ -507,13 +507,6 @@ describe('Issuable output', () => {
       expect(wrapper.vm.issueChanged).toBe(false);
     });
 
-    it('returns false when `initialTitleText` is null and `formState.title` is empty string', () => {
-      wrapper.vm.store.formState.title = '';
-      wrapper.setProps({ initialTitleText: null });
-
-      expect(wrapper.vm.issueChanged).toBe(false);
-    });
-
     it('returns true when description is changed', () => {
       wrapper.vm.store.formState.description = 'RandomText';
 

spec/frontend/sentry_error_stack_trace/components/sentry_error_stack_trace_spec.js

@@ -78,10 +78,5 @@ describe('Sentry Error Stack Trace', () => {
       expect(wrapper.find(GlLoadingIcon).exists()).toBe(false);
       expect(wrapper.find(Stacktrace).exists()).toBe(true);
     });
-
-    it('should not show stacktrace if it does not exist', () => {
-      expect(wrapper.find(GlLoadingIcon).exists()).toBe(false);
-      expect(wrapper.find(Stacktrace).exists()).toBe(false);
-    });
   });
 });