Removed inconsistent asserts from Process::raisePrivilege() and ::lowerPrivilege() on macOS and Windows

modules/juce_core/native/juce_mac_Threads.mm

@@ -65,20 +65,10 @@ JUCE_API void JUCE_CALLTYPE Process::hide()
     }
 }
 
-JUCE_API void JUCE_CALLTYPE Process::raisePrivilege()
-{
-    jassertfalse;
-}
+JUCE_API void JUCE_CALLTYPE Process::raisePrivilege() {}
+JUCE_API void JUCE_CALLTYPE Process::lowerPrivilege() {}
 
-JUCE_API void JUCE_CALLTYPE Process::lowerPrivilege()
-{
-    jassertfalse;
-}
-
-JUCE_API void JUCE_CALLTYPE Process::setPriority (ProcessPriority)
-{
-    // xxx
-}
+JUCE_API void JUCE_CALLTYPE Process::setPriority (ProcessPriority) {}
 
 //==============================================================================
 JUCE_API bool JUCE_CALLTYPE juce_isRunningUnderDebugger() noexcept

modules/juce_core/native/juce_win32_Threads.cpp

@@ -258,15 +258,8 @@ void JUCE_CALLTYPE Process::setCurrentModuleInstanceHandle (void* const newHandl
     currentModuleHandle = newHandle;
 }
 
-void JUCE_CALLTYPE Process::raisePrivilege()
-{
-    jassertfalse; // xxx not implemented
-}
-
-void JUCE_CALLTYPE Process::lowerPrivilege()
-{
-    jassertfalse; // xxx not implemented
-}
+void JUCE_CALLTYPE Process::raisePrivilege() {}
+void JUCE_CALLTYPE Process::lowerPrivilege() {}
 
 void JUCE_CALLTYPE Process::terminate()
 {