staging: rtl8188eu: remove RT_TRACE macro

Remove RT_TRACE macro from include/rtw_debug.h, as it now has no
callers, and does not follow best practices and kernel coding
conventions.
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210625000756.6313-21-phil@philpotter.co.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/rtw_debug.h

@@ -58,13 +58,4 @@
 
 extern u32 GlobalDebugLevel;
 
-#define RT_TRACE(_comp, _level, fmt)					\
-	do {								\
-		if (_level <= GlobalDebugLevel) {			\
-			pr_info("%s [0x%08x,%d]", DRIVER_PREFIX,	\
-				 (unsigned int)_comp, _level);		\
-			pr_info fmt;					\
-		}							\
-	} while (0)
-
 #endif	/* __RTW_DEBUG_H__ */