remove PotionEffect color API as it was removed upstream

appears that value was never even used anyways

Spigot-API-Patches/0103-PotionEffect-clone-methods.patch

@@ -1,38 +1,35 @@
-From fa0d7b6333526b569fbbcb238d570f0ae7949651 Mon Sep 17 00:00:00 2001
+From 18997534f496e4e8c96f06b8632f4605bc513711 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sun, 3 Jun 2018 04:10:13 -0400
 Subject: [PATCH] PotionEffect clone methods
 
 
 diff --git a/src/main/java/org/bukkit/potion/PotionEffect.java b/src/main/java/org/bukkit/potion/PotionEffect.java
-index 86616f1b8..35984ef6c 100644
+index 86616f1b8..efb55d29c 100644
 --- a/src/main/java/org/bukkit/potion/PotionEffect.java
 +++ b/src/main/java/org/bukkit/potion/PotionEffect.java
-@@ -100,6 +100,30 @@ public class PotionEffect implements ConfigurationSerializable {
+@@ -100,6 +100,27 @@ public class PotionEffect implements ConfigurationSerializable {
          this(getEffectType(map), getInt(map, DURATION), getInt(map, AMPLIFIER), getBool(map, AMBIENT, false), getBool(map, PARTICLES, true), getBool(map, ICON, getBool(map, PARTICLES, true)));
      }
  
 +    // Paper start
 +    public PotionEffect withType(PotionEffectType type) {
-+        return new PotionEffect(type, duration, amplifier, ambient, particles, color);
++        return new PotionEffect(type, duration, amplifier, ambient, particles, icon);
 +    }
 +    public PotionEffect withDuration(int duration) {
-+        return new PotionEffect(this.type, duration, amplifier, ambient, particles, color);
++        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
 +    }
 +    public PotionEffect withAmplifier(int amplifier) {
-+        return new PotionEffect(this.type, duration, amplifier, ambient, particles, color);
++        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
 +    }
 +    public PotionEffect withAmbient(boolean ambient) {
-+        return new PotionEffect(this.type, duration, amplifier, ambient, particles, color);
++        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
 +    }
 +    public PotionEffect withParticles(boolean particles) {
-+        return new PotionEffect(this.type, duration, amplifier, ambient, particles, color);
++        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
 +    }
-+    public PotionEffect withParticles(boolean particles, Color color) {
++    public PotionEffect withIcon(boolean icon) {
-+        return new PotionEffect(this.type, duration, amplifier, ambient, particles, color);
++        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
-+    }
-+    public PotionEffect withColor(Color color) {
-+        return new PotionEffect(this.type, duration, amplifier, ambient, particles, color);
 +    }
 +    // Paper end
 +