Cleanup: remove old DEBUG macro and debug function

src/debug.cpp

@@ -143,24 +143,6 @@ void debug_print(const char *dbg, const char *buf)
 	}
 }
 
-/**
- * Output a debug line.
- * @note Do not call directly, use the #DEBUG macro instead.
- * @param dbg Debug category.
- * @param format Text string a la printf, with optional arguments.
- */
-void CDECL debug(const char *dbg, const char *format, ...)
-{
-	char buf[1024];
-
-	va_list va;
-	va_start(va, format);
-	vseprintf(buf, lastof(buf), format, va);
-	va_end(va);
-
-	debug_print(dbg, buf);
-}
-
 /**
  * Set debugging levels by parsing the text in \a s.
  * For setting individual levels a string like \c "net=3,grf=6" should be used.

src/debug.h

@@ -15,7 +15,7 @@
 #include "3rdparty/fmt/format.h"
 
 /* Debugging messages policy:
- * These should be the severities used for direct DEBUG() calls
+ * These should be the severities used for direct Debug() calls
  * maximum debugging level should be 10 if really deep, deep
  * debugging is needed.
  * (there is room for exceptions, but you have to have a good cause):
@@ -38,13 +38,6 @@ void debug_print(const char *dbg, const char *buf);
  */
 #define Debug(name, level, format_string, ...) if ((level) == 0 || _debug_ ## name ## _level >= (level)) debug_print(#name, fmt::format(FMT_STRING(format_string), ## __VA_ARGS__).c_str())
 
-/**
- * Output a line of debugging information.
- * @param name Category
- * @param level Debugging level, higher levels means more detailed information.
- */
-#define DEBUG(name, level, ...) if ((level) == 0 || _debug_ ## name ## _level >= (level)) debug(#name, __VA_ARGS__)
-
 extern int _debug_driver_level;
 extern int _debug_grf_level;
 extern int _debug_map_level;
@@ -64,8 +57,6 @@ extern int _debug_console_level;
 extern int _debug_random_level;
 #endif
 
-void CDECL debug(const char *dbg, const char *format, ...) WARN_FORMAT(2, 3);
-
 char *DumpDebugFacilityNames(char *buf, char *last);
 void SetDebugString(const char *s);
 const char *GetDebugString();