diff --git a/src/core/Global.h b/src/core/Global.h
index 914c7b412..14281eeec 100644
--- a/src/core/Global.h
+++ b/src/core/Global.h
@@ -20,104 +20,8 @@
 #ifndef KEEPASSX_GLOBAL_H
 #define KEEPASSX_GLOBAL_H
 
-// mostly copied from qcompilerdetection.h which is part of Qt 5
-
 #include <QtGlobal>
 
-#ifdef Q_CC_CLANG
-#  if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
-#    if __has_feature(cxx_strong_enums)
-#      define COMPILER_CLASS_ENUM
-#    endif
-#    if __has_feature(cxx_constexpr)
-#      define COMPILER_CONSTEXPR
-#    endif
-#    if __has_feature(cxx_decltype) /* && __has_feature(cxx_decltype_incomplete_return_types) */
-#      define COMPILER_DECLTYPE
-#    endif
-#    if __has_feature(cxx_override_control)
-#      define COMPILER_EXPLICIT_OVERRIDES
-#    endif
-#    if __has_feature(cxx_nullptr)
-#      define COMPILER_NULLPTR
-#    endif
-#    if __has_feature(cxx_static_assert)
-#      define COMPILER_STATIC_ASSERT
-#    endif
-#  endif
-#endif // Q_CC_CLANG
-
-#if defined(Q_CC_GNU) && !defined(Q_CC_INTEL) && !defined(Q_CC_CLANG)
-#  if defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L
-#    if (__GNUC__ * 100 + __GNUC_MINOR__) >= 403
-#      define COMPILER_DECLTYPE
-#      define COMPILER_STATIC_ASSERT
-#    endif
-#    if (__GNUC__ * 100 + __GNUC_MINOR__) >= 404
-#      define COMPILER_CLASS_ENUM
-#    endif
-#    if (__GNUC__ * 100 + __GNUC_MINOR__) >= 406
-#      define COMPILER_CONSTEXPR
-#      define COMPILER_NULLPTR
-#    endif
-#    if (__GNUC__ * 100 + __GNUC_MINOR__) >= 407
-#      define COMPILER_EXPLICIT_OVERRIDES
-#    endif
-#  endif
-#endif
-
-/*
- * C++11 keywords and expressions
- */
-#if !defined(Q_NULLPTR)
-#  ifdef COMPILER_NULLPTR
-#    define Q_NULLPTR nullptr
-#  else
-#    define Q_NULLPTR 0
-#  endif
-#endif
-
-#if !defined(Q_DECL_CONSTEXPR)
-#  ifdef COMPILER_CONSTEXPR
-#    define Q_DECL_CONSTEXPR constexpr
-#  else
-#    define Q_DECL_CONSTEXPR
-#  endif
-#endif
-
-#if !defined(Q_DECL_OVERRIDE) && !defined(Q_DECL_FINAL) && !defined(Q_DECL_FINAL_CLASS)
-#  ifdef COMPILER_EXPLICIT_OVERRIDES
-#    define Q_DECL_OVERRIDE override
-#    define Q_DECL_FINAL final
-#    ifdef  COMPILER_DECLTYPE
-#      define Q_DECL_FINAL_CLASS final
-#    else
-#      define Q_DECL_FINAL_CLASS
-#    endif
-#  else
-#    define Q_DECL_OVERRIDE
-#    define Q_DECL_FINAL
-#    define Q_DECL_FINAL_CLASS
-#  endif
-#endif
-
-#if !defined(Q_STATIC_ASSERT) && !defined(Q_STATIC_ASSERT_X)
-#ifdef COMPILER_STATIC_ASSERT
-#define Q_STATIC_ASSERT(Condition) static_assert(static_cast<bool>(Condition), #Condition)
-#define Q_STATIC_ASSERT_X(Condition, Message) static_assert(static_cast<bool>(Condition), Message)
-#else
-// Intentionally undefined
-template <bool Test> class QStaticAssertFailure;
-template <> class QStaticAssertFailure<true> {};
-
-#define Q_STATIC_ASSERT_PRIVATE_JOIN(A, B) Q_STATIC_ASSERT_PRIVATE_JOIN_IMPL(A, B)
-#define Q_STATIC_ASSERT_PRIVATE_JOIN_IMPL(A, B) A ## B
-#define Q_STATIC_ASSERT(Condition) \
-    enum {Q_STATIC_ASSERT_PRIVATE_JOIN(q_static_assert_result, __LINE__) = sizeof(QStaticAssertFailure<!!(Condition)>)}
-#define Q_STATIC_ASSERT_X(Condition, Message) Q_STATIC_ASSERT(Condition)
-#endif // COMPILER_STATIC_ASSERT
-#endif // !defined(Q_STATIC_ASSERT) && !defined(Q_STATIC_ASSERT_X)
-
 #if defined(Q_OS_WIN)
 #  if defined(KEEPASSX_BUILDING_CORE)
 #    define KEEPASSX_EXPORT Q_DECL_EXPORT