Fix MockEnvironmentEngine function specifiers

Signed-off-by: Martin Stump <martin.stump@mercedes-benz.com>

test/MantleAPI/Execution/mock_environment_engine.h

@@ -22,7 +22,7 @@ class MockEnvironmentEngine final : public IEnvironmentEngine
 {
 public:
   MOCK_METHOD(mantle_api::IEnvironment*, GetEnvironment, (), (noexcept, override));
-  MOCK_METHOD(void, Step, (Time size), (noexcept, override));
+  MOCK_METHOD(void, Step, (Time size), (override));
   MOCK_METHOD(std::optional<mantle_api::Time>, GetStepSize, (), (const, noexcept, override));
 };