remove wrong LanguageStandard

Author: q4a

src/xrSound/xrSound.vcxproj

@@ -139,7 +139,6 @@
     <ClCompile>
       <AdditionalIncludeDirectories>$(xrExternals)libvorbis\include;$(xrExternals)libogg\include;$(xrExternals)OpenAL\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_USRDLL;XRSOUND_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <LanguageStandard>stdcpp14</LanguageStandard>
     </ClCompile>
     <Link>
       <AdditionalDependencies>eax.lib;dsound.lib;%(AdditionalDependencies)</AdditionalDependencies>