boot: pxe: Drop the duplicate comment on get_pxe_file()

This function is exported, so document it in the header file. Drop the
duplicate comment in the C file.

Signed-off-by: Simon Glass <sjg@chromium.org>

boot/pxe_utils.c

@@ -133,16 +133,6 @@ static int get_relfile(struct pxe_context *ctx, const char *file_path,
 	return 1;
 }
 
-/**
- * get_pxe_file() - read a file
- *
- * The file is read and nul-terminated
- *
- * @ctx: PXE context
- * @file_path: File path to read (relative to the PXE file)
- * @file_addr: Address to load file to
- * Returns 1 for success, or < 0 on error
- */
 int get_pxe_file(struct pxe_context *ctx, const char *file_path,
 		 ulong file_addr)
 {