windows: remove call to SetProcessDEPPolicy

SetProcessDEPPolicy() is only supported by 32-bit Windows processes. On 64-bit
Windows it fails with ERROR_NOT_SUPPORTED (DEP is always enabled on 64-bit).

More info:
https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-setprocessdeppolicy

Author: fanquake

src/init.cpp

@@ -877,9 +877,6 @@ bool AppInitBasicSetup()
     _set_abort_behavior(0, _WRITE_ABORT_MSG | _CALL_REPORTFAULT);
 #endif
 #ifdef WIN32
-    // Enable Data Execution Prevention (DEP)
-    SetProcessDEPPolicy(PROCESS_DEP_ENABLE);
-
     // Enable heap terminate-on-corruption
     HeapSetInformation(nullptr, HeapEnableTerminationOnCorruption, nullptr, 0);
 #endif