Revert "Cover empty affinity mask case"

This reverts commit 40639366d5212bd77a4946dd2e78217ef4b5d043.

Author: LukaszJobczyk

opencl/test/unit_test/os_interface/device_factory_tests.cpp

@@ -142,21 +142,6 @@ TEST_F(DeviceFactoryTest, givenZeAffinityMaskSetToGreaterSubDeviceThanAvailableW
     EXPECT_EQ(devices[0]->getNumAvailableDevices(), 4u);
 }
 
-TEST_F(DeviceFactoryTest, givenEmptyAffintyMaskWhenCreateDeviceThenAllDevicesAreReturned) {
-    DebugManagerStateRestore restorer;
-    DebugManager.flags.CreateMultipleRootDevices.set(2);
-    DebugManager.flags.CreateMultipleSubDevices.set(4);
-    DebugManager.flags.ZE_AFFINITY_MASK.set("");
-    VariableBackup<UltHwConfig> backup(&ultHwConfig);
-    ultHwConfig.useMockedPrepareDeviceEnvironmentsFunc = false;
-
-    auto devices = DeviceFactory::createDevices(*executionEnvironment);
-
-    EXPECT_EQ(devices.size(), 2u);
-    EXPECT_EQ(devices[0]->getNumAvailableDevices(), 4u);
-    EXPECT_EQ(devices[0]->getNumAvailableDevices(), 4u);
-}
-
 TEST_F(DeviceFactoryTest, givenZeAffinityMaskSetToRootDevicesOnlyWhenCreateDevicesThenProperNumberOfDevicesIsReturned) {
     DebugManagerStateRestore restorer;
     DebugManager.flags.CreateMultipleRootDevices.set(2);

shared/source/execution_environment/execution_environment.cpp

@@ -82,7 +82,7 @@ void ExecutionEnvironment::prepareRootDeviceEnvironments(uint32_t numRootDevices
 void ExecutionEnvironment::parseAffinityMask() {
     auto affinityMaskString = DebugManager.flags.ZE_AFFINITY_MASK.get();
 
-    if (affinityMaskString.compare("default") == 0 || affinityMaskString.empty()) {
+    if (affinityMaskString.compare("default") == 0) {
         return;
     }