ntru: Remove legacy NTRU key exchange method

src/libstrongswan/crypto/key_exchange.h

@@ -75,11 +75,6 @@ enum key_exchange_method_t {
 	ML_KEM_1024   = 37,
 	/** insecure NULL diffie hellman group for testing, in PRIVATE USE */
 	MODP_NULL     = 1024,
-	/** Parameters defined by IEEE 1363.1, in PRIVATE USE */
-	NTRU_112_BIT  = 1030,
-	NTRU_128_BIT  = 1031,
-	NTRU_192_BIT  = 1032,
-	NTRU_256_BIT  = 1033,
 	/** MODP group with custom generator/prime */
 	/** internally used DH group with additional parameters g and p, outside
 	 * of PRIVATE USE (i.e. IKEv2 DH group range) so it can't be negotiated */