Fix config header duplication on reload

Fixes #3100

common/src/main/java/com/viaversion/viaversion/util/CommentStore.java

@@ -17,7 +17,6 @@
  */
 package com.viaversion.viaversion.util;
 
-import com.google.common.base.Joiner;
 import com.google.common.io.CharStreams;
 import com.google.common.io.Files;
 
@@ -85,6 +84,9 @@ public class CommentStore {
     }
 
     public void storeComments(final InputStream inputStream) throws IOException {
+        mainHeader.clear();
+        headers.clear();
+
         final String data;
         try (final InputStreamReader reader = new InputStreamReader(inputStream, StandardCharsets.UTF_8)) {
             data = CharStreams.toString(reader);
@@ -219,20 +221,6 @@ public class CommentStore {
         Files.write(fileData.toString(), output, StandardCharsets.UTF_8);
     }
 
-    private String addHeaderTags(final List<String> header, final String indent) {
-        final StringBuilder builder = new StringBuilder();
-        for (final String line : header) {
-            builder.append(indent).append("# ").append(line).append('\n');
-        }
-        return builder.toString();
-    }
-
-    private String join(final String[] array, final char joinChar, final int start, final int length) {
-        final String[] copy = new String[length - start];
-        System.arraycopy(array, start, copy, 0, length - start);
-        return Joiner.on(joinChar).join(copy);
-    }
-
     private int getIndents(final String line) {
         int count = 0;
         for (int i = 0; i < line.length(); i++) {
@@ -250,16 +238,4 @@ public class CommentStore {
         System.arraycopy(array, 0, copy, 0, length);
         return String.join(this.pathSeparator, copy);
     }
-
-    private int getSuccessiveSpaces(final String text) {
-        int count = 0;
-        for (int i = 0; i < text.length(); i++) {
-            if (text.charAt(i) == ' ') {
-                count += 1;
-            } else {
-                break;
-            }
-        }
-        return count;
-    }
 }