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diff --git a/doc/crypto/BIO_f_buffer.pod b/doc/crypto/BIO_f_buffer.pod
deleted file mode 100644
index c0dccf1abe31..000000000000
--- a/doc/crypto/BIO_f_buffer.pod
+++ /dev/null
@@ -1,74 +0,0 @@
-=pod
-
-=head1 NAME
-
-BIO_f_buffer - buffering BIO
-
-=head1 SYNOPSIS
-
- #include <openssl/bio.h>
-
- BIO_METHOD * BIO_f_buffer(void);
-
- #define BIO_get_buffer_num_lines(b)	BIO_ctrl(b,BIO_C_GET_BUFF_NUM_LINES,0,NULL)
- #define BIO_set_read_buffer_size(b,size) BIO_int_ctrl(b,BIO_C_SET_BUFF_SIZE,size,0)
- #define BIO_set_write_buffer_size(b,size) BIO_int_ctrl(b,BIO_C_SET_BUFF_SIZE,size,1)
- #define BIO_set_buffer_size(b,size)	BIO_ctrl(b,BIO_C_SET_BUFF_SIZE,size,NULL)
- #define BIO_set_buffer_read_data(b,buf,num) BIO_ctrl(b,BIO_C_SET_BUFF_READ_DATA,num,buf)
-
-=head1 DESCRIPTION
-
-BIO_f_buffer() returns the buffering BIO method.
-
-Data written to a buffering BIO is buffered and periodically written
-to the next BIO in the chain. Data read from a buffering BIO comes from
-an internal buffer which is filled from the next BIO in the chain.
-Both BIO_gets() and BIO_puts() are supported.
-
-Calling BIO_reset() on a buffering BIO clears any buffered data.
-
-BIO_get_buffer_num_lines() returns the number of lines currently buffered.
-
-BIO_set_read_buffer_size(), BIO_set_write_buffer_size() and BIO_set_buffer_size()
-set the read, write or both read and write buffer sizes to B<size>. The initial
-buffer size is DEFAULT_BUFFER_SIZE, currently 4096. Any attempt to reduce the
-buffer size below DEFAULT_BUFFER_SIZE is ignored. Any buffered data is cleared
-when the buffer is resized.
-
-BIO_set_buffer_read_data() clears the read buffer and fills it with B<num>
-bytes of B<buf>. If B<num> is larger than the current buffer size the buffer
-is expanded.
-
-=head1 NOTES
-
-Buffering BIOs implement BIO_gets() by using BIO_read() operations on the
-next BIO in the chain. By prepending a buffering BIO to a chain it is therefore
-possible to provide BIO_gets() functionality if the following BIOs do not
-support it (for example SSL BIOs).
-
-Data is only written to the next BIO in the chain when the write buffer fills
-or when BIO_flush() is called. It is therefore important to call BIO_flush()
-whenever any pending data should be written such as when removing a buffering
-BIO using BIO_pop(). BIO_flush() may need to be retried if the ultimate
-source/sink BIO is non blocking.
-
-=head1 RETURN VALUES
-
-BIO_f_buffer() returns the buffering BIO method.
-
-BIO_get_buffer_num_lines() returns the number of lines buffered (may be 0).
-
-BIO_set_read_buffer_size(), BIO_set_write_buffer_size() and BIO_set_buffer_size()
-return 1 if the buffer was successfully resized or 0 for failure.
-
-BIO_set_buffer_read_data() returns 1 if the data was set correctly or 0 if
-there was an error.
-
-=head1 SEE ALSO
-
-L<BIO(3)|BIO(3)>,
-L<BIO_reset(3)|BIO_reset(3)>,
-L<BIO_flush(3)|BIO_flush(3)>,
-L<BIO_pop(3)|BIO_pop(3)>,
-L<BIO_ctrl(3)|BIO_ctrl(3)>,
-L<BIO_int_ctrl(3)|BIO_ctrl(3)>