Remove silencing of non-existent warnings

Author: tautschnig

src/nonstd/optional.hpp

@@ -59,16 +59,6 @@
 # define optional_COMPILER_GNUC_VERSION    0
 #endif
 
-#if optional_BETWEEN(optional_COMPILER_MSVC_VERSION, 7, 14 )
-# pragma warning( push )
-# pragma warning( disable: 4345 )   // initialization behavior changed
-#endif
-
-#if optional_BETWEEN(optional_COMPILER_MSVC_VERSION, 7, 15 )
-# pragma warning( push )
-# pragma warning( disable: 4814 )   // in C++14 'constexpr' will not imply 'const'
-#endif
-
 // Presence of C++11 language features:
 
 #if optional_CPP11_OR_GREATER || optional_COMPILER_MSVC_VERSION >= 10