Revert "[MM-41576] Revamp database schema version (#19586)" (#19746)

* Revert "[MM-41576] Revamp database schema version (#19586)"

This reverts commit 645fee3fe3.

* Revert "MM-42049 - license endpoint not working (#19686)"

This reverts commit 4fe89e5847.

web/context_test.go

@@ -68,7 +68,6 @@ func TestMfaRequired(t *testing.T) {
 	mockStore.On("User").Return(&mockUserStore)
 	mockStore.On("Post").Return(&mockPostStore)
 	mockStore.On("System").Return(&mockSystemStore)
-	mockStore.On("GetDBSchemaVersion").Return(1, nil)
 
 	th.App.Srv().SetLicense(model.NewTestLicense("mfa"))