Revert "Implement ARGON2 hash (#1165)" due to an unwanted added binary.

This reverts commit bf38782790.

src/test/java/fr/xephi/authme/security/crypts/Argon2Test.java

@@ -1,21 +0,0 @@
-package fr.xephi.authme.security.crypts;
-
-/**
- * Test for {@link Argon2}.
- */
-public class Argon2Test extends AbstractEncryptionMethodTest {
-
-    public Argon2Test() {
-        super(new Argon2(),
-            "$argon2i$v=19$m=65536,t=2,p=1$dOP8NiXsPTcMgzI4Z8Rbew$ShdowtoTEWTL5UTFz1UgQOigb9JOlm4ZxWPA6WbIeUw",  // password
-            "$argon2i$v=19$m=65536,t=2,p=1$amZHbPfgc5peKd/4w1AI1g$Q2PUiOVw47TACijP57U0xf7QfiZ00HV4eFzMDA6yKRE",  // PassWord1
-            "$argon2i$v=19$m=65536,t=2,p=1$58v7dWNn9/bpD00QLzSebw$7cMC7p0qceE3Mgf2yQp4X7c+UkO9oyJwQ7S6XTBubNs",  // &^%te$t?Pw@_
-            "$argon2i$v=19$m=65536,t=2,p=1$93OSU71DgBOzpmhti7+6rQ$sSSI6QQQdoG9DlGwLjYz576kTek89nwr9CyNpy6bsL0"); // âË_3(íù*
-    }
-
-    @Override
-    protected boolean testHashEqualityForSameSalt() {
-        // Argon2 has a salt but it is handled internally
-        return false;
-    }
-}