test: remove eight low-value suites and 198 individual cases (#36650)

* test: remove low-value suites and cases

* test: fix retained timestamps and prune flaky baseline

* test: document malformed persisted-provider fixture cast

* test: restore types used by retained divergence regressions

src/main/github/project-view/project-view-config.test.ts

@@ -183,12 +183,4 @@ describe('finalizeView verticalGroupByFields normalization', () => {
       ])
     }
   })
-
-  it('omits the key entirely when the host never sent it (wire-compat shape)', () => {
-    const finalized = finalizeView(base, [])
-    expect(finalized.ok).toBe(true)
-    if (finalized.ok) {
-      expect('verticalGroupByFields' in finalized.view).toBe(false)
-    }
-  })
 })