acl: remove classify methods count enum

Removal of unused enum value (RTE_ACL_CLASSIFY_NUM).
This enum value is not used inside DPDK, while it prevents
to add new classify algorithms without causing an ABI breakage.

Note that this change introduce a formal ABI incompatibility
with previous versions of ACL library.

Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>

doc/guides/rel_notes/deprecation.rst

@@ -202,10 +202,6 @@ Deprecation Notices
   - https://patches.dpdk.org/patch/71457/
   - https://patches.dpdk.org/patch/71456/
 
-* acl: ``RTE_ACL_CLASSIFY_NUM`` enum value will be removed.
-  This enum value is not used inside DPDK, while it prevents to add new
-  classify algorithms without causing an ABI breakage.
-
 * sched: To allow more traffic classes, flexible mapping of pipe queues to
   traffic classes, and subport level configuration of pipes and queues
   changes will be made to macros, data structures and API functions defined

doc/guides/rel_notes/release_20_11.rst

@@ -304,6 +304,10 @@ API Changes
 
 * bpf: ``RTE_BPF_XTYPE_NUM`` has been dropped from ``rte_bpf_xtype``.
 
+* acl: ``RTE_ACL_CLASSIFY_NUM`` enum value has been removed.
+  This enum value was not used inside DPDK, while it prevented to add new
+  classify algorithms without causing an ABI breakage.
+
 
 ABI Changes
 -----------

lib/librte_acl/rte_acl.h

@@ -241,7 +241,6 @@ enum rte_acl_classify_alg {
 	RTE_ACL_CLASSIFY_AVX2 = 3,    /**< requires AVX2 support. */
 	RTE_ACL_CLASSIFY_NEON = 4,    /**< requires NEON support. */
 	RTE_ACL_CLASSIFY_ALTIVEC = 5,    /**< requires ALTIVEC support. */
-	RTE_ACL_CLASSIFY_NUM          /* should always be the last one. */
 };
 
 /**