Fixing the sairedis build issue caused at sonic-net/sonic-buildimage#…

…21614 , Removing the undefine MOCK functions to fix the issue.

Signed-off-by: Rajesh Perumal <[email protected]>

unittest/lib/MockSaiInterface.h

@@ -9,7 +9,6 @@ class MockSaiInterface: public saimeta::DummySaiInterface
     public:
 
         MockSaiInterface();
-
         virtual ~MockSaiInterface();
 
     public:
@@ -18,9 +17,5 @@ class MockSaiInterface: public saimeta::DummySaiInterface
                 _In_ uint64_t flags,
                 _In_ const sai_service_method_table_t *service_method_table) override;
         virtual sai_status_t apiUninitialize(void) override;
-public:
-    MOCK_METHOD(sai_status_t, queryStatsCapability,
-        (sai_object_id_t switchOid, sai_object_type_t objectType, sai_stat_capability_list_t* statCapList),
-        (override));
 };