Bug 5772. Getting rid of the 4-byte version of PRUnichar.

base/src/nscore.h

@@ -32,19 +32,9 @@
 #include "nsDebug.h"
 #endif
 
-/** ucs2 datatype for 2 byte unicode characters */
-typedef PRUint16 PRUcs2;
-
-/** ucs4 datatype for 4 byte unicode characters */
-typedef PRUint32 PRUcs4;
-
 #ifndef __PRUNICHAR__
 #define __PRUNICHAR__
-#ifdef NS_UCS4
-typedef PRUcs4 PRUnichar;
-#else
-typedef PRUcs2 PRUnichar;
-#endif
+typedef PRUint16 PRUnichar;
 #endif
 
 /// The preferred symbol for null.