[DCCP]: Remove unused inline function

The function follows48(), which is a special-case of dccp_delta_seqno(),
is nowhere used in the DCCP code, thus removed by this patch.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/dccp.h

@@ -153,12 +153,6 @@ static inline u64 max48(const u64 seq1, const u64 seq2)
 	return after48(seq1, seq2) ? seq1 : seq2;
 }
 
-/* is seq1 next seqno after seq2 */
-static inline int follows48(const u64 seq1, const u64 seq2)
-{
-	return dccp_delta_seqno(seq2, seq1) == 1;
-}
-
 enum {
 	DCCP_MIB_NUM = 0,
 	DCCP_MIB_ACTIVEOPENS,			/* ActiveOpens */