Drop the log buffer

This does not appear to be used by any boards. Before introducing a new
log system, remove this old one.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

post/post.c

@@ -15,10 +15,6 @@
 #include <asm/gpio.h>
 #endif
 
-#ifdef CONFIG_LOGBUFFER
-#include <logbuff.h>
-#endif
-
 DECLARE_GLOBAL_DATA_PTR;
 
 #define POST_MAX_NUMBER		32
@@ -407,13 +403,8 @@ int post_log(char *format, ...)
 	vsprintf(printbuffer, format, args);
 	va_end(args);
 
-#ifdef CONFIG_LOGBUFFER
-	/* Send to the logbuffer */
-	logbuff_log(printbuffer);
-#else
 	/* Send to the stdout file */
 	puts(printbuffer);
-#endif
 
 	return 0;
 }

post/tests.c

@@ -3,10 +3,6 @@
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * SPDX-License-Identifier:	GPL-2.0+
- *
- * Be sure to mark tests to be run before relocation as such with the
- * CONFIG_SYS_POST_PREREL flag so that logging is done correctly if the
- * logbuffer support is enabled.
  */
 
 #include <common.h>