Fix Linux build

Author: Rainyan

src/public/tier1/strtools.h

@@ -890,16 +890,10 @@ bool V_BBCodeToHTML( OUT_Z_CAP( nDestSize ) char *pDest, const int nDestSize, ch
 
 // helper to identify "mean" spaces, which we don't like in visible identifiers
 // such as player Name
-#ifdef NEO
-constexpr
-#endif
 bool V_IsMeanSpaceW( wchar_t wch );
 
 // helper to identify characters which are deprecated in Unicode,
 // and we simply don't accept
-#ifdef NEO
-constexpr
-#endif
 bool V_IsDeprecatedW( wchar_t wch );
 
 //-----------------------------------------------------------------------------

src/tier1/strtools.cpp

@@ -3942,9 +3942,6 @@ bool V_IsMeanUnderscoreW( wchar_t wch )
 //			characters in this set are removed from the beginning and/or end of strings
 //			by Q_AggressiveStripPrecedingAndTrailingWhitespaceW() 
 //-----------------------------------------------------------------------------
-#ifdef NEO
-constexpr
-#endif
 bool V_IsMeanSpaceW( wchar_t wch )
 {
 	bool bIsMean = false;
@@ -4032,9 +4029,6 @@ bool V_IsMeanSpaceW( wchar_t wch )
 // Ideally, we'd perfectly support these end-to-end but we never realistically will.
 // The benefit of doing so far outweighs the cost, anyway.
 //-----------------------------------------------------------------------------
-#ifdef NEO
-constexpr
-#endif
 bool V_IsDeprecatedW( wchar_t wch )
 {
 	bool bIsDeprecated = false;