Revert "SPIGOT-4035: Enforce case-sensitivity for chat format code matching."

Minecraft allows uppercase colour codes.

This reverts commit d480dc74e5.

src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java

@@ -40,7 +40,7 @@ public final class CraftChatMessage {
     }
 
     private static class StringMessage {
-        private static final Pattern INCREMENTAL_PATTERN = Pattern.compile("(" + String.valueOf(org.bukkit.ChatColor.COLOR_CHAR) + "[0-9a-fk-or])|(\\n)|(?i)((?:(?:https?):\\/\\/)?(?:[-\\w_\\.]{2,}\\.[a-z]{2,4}.*?(?=[\\.\\?!,;:]?(?:[" + String.valueOf(org.bukkit.ChatColor.COLOR_CHAR) + " \\n]|$))))");
+        private static final Pattern INCREMENTAL_PATTERN = Pattern.compile("(" + String.valueOf(org.bukkit.ChatColor.COLOR_CHAR) + "[0-9a-fk-or])|(\\n)|((?:(?:https?):\\/\\/)?(?:[-\\w_\\.]{2,}\\.[a-z]{2,4}.*?(?=[\\.\\?!,;:]?(?:[" + String.valueOf(org.bukkit.ChatColor.COLOR_CHAR) + " \\n]|$))))", Pattern.CASE_INSENSITIVE);
 
         private final List<IChatBaseComponent> list = new ArrayList<IChatBaseComponent>();
         private IChatBaseComponent currentChatComponent = new ChatComponentText("");

src/test/java/org/bukkit/ChatTest.java

@@ -23,14 +23,6 @@ public class ChatTest {
         }
     }
 
-    @Test
-    public void testColorConversion() {
-        String test = String.format("%1$sA%1$sa%1$sB%1$sb%1$sC%1$sc%1$sD%1$sd%1$sE%1$se%1$sZ%1$sz%1$s", ChatColor.COLOR_CHAR);
-        IChatBaseComponent name = CraftChatMessage.fromStringOrNull(test);
-        assertEquals(test.replace(String.valueOf(ChatColor.COLOR_CHAR), ""),
-                CraftChatMessage.fromComponent(name).replace(String.valueOf(ChatColor.COLOR_CHAR), ""));
-    }
-
     @Test
     public void testURLJsonConversion() {
         IChatBaseComponent[] components;