CMake(Windows): remove USE_WIN_NTAPI option

src/detection/cpuUsage/cpuUsage_windows.c

@@ -1,8 +1,6 @@
 #include "fastfetch.h"
 #include "cpuUsage.h"
 
-#ifdef FF_USE_WIN_NTAPI
-
 #include "util/mallocHelper.h"
 
 #include <ntstatus.h>
@@ -37,26 +35,3 @@ const char* ffGetCpuUsageInfo(uint64_t* inUseAll, uint64_t* totalAll)
 
     return NULL;
 }
-
-#else
-
-#include <processthreadsapi.h>
-
-static inline uint64_t fileTimeToUint64(const FILETIME* ft) {
-    return (((uint64_t)ft->dwHighDateTime) << 32) | ((uint64_t)ft->dwLowDateTime);
-}
-
-const char* ffGetCpuUsageInfo(uint64_t* inUseAll, uint64_t* totalAll)
-{
-    FILETIME idleTime, kernelTime, userTime;
-    if(!GetSystemTimes(&idleTime, &kernelTime, &userTime))
-        return "GetSystemTimes() failed";
-
-    // https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-getsystemtimes
-    // `kernelTime` also includes the amount of time the system has been idle.
-    *totalAll = fileTimeToUint64(&userTime) + fileTimeToUint64(&kernelTime);
-    *inUseAll = *totalAll - fileTimeToUint64(&idleTime);
-    return NULL;
-}
-
-#endif