Removed unneeded comment and changed logic to unindent some lines

FileHandler.gd

@@ -19,31 +19,30 @@ static func create_directory_if_missing(path: String):
 
 static func find_file_duplicate(directory_path: String, target_name: String, target_content: PoolByteArray, relative_path: String):
 	var dir = Directory.new()
-	if dir.open(directory_path) == OK:
-		dir.list_dir_begin(true)
-		var file_name = dir.get_next()
-		while file_name != "":
-			var full_path = directory_path.plus_file(file_name)
-			var current_relative_path = relative_path.plus_file(file_name)
-			if dir.current_is_dir():
-				var found_path = find_file_duplicate(full_path, target_name, target_content, current_relative_path)
-				if found_path != "":
-					dir.list_dir_end()
-					return found_path
-			if file_name == target_name:
-				var file = File.new()
-				file.open(full_path, File.READ)
-				var file_content = file.get_buffer(file.get_len())
-				file.close()
-				if file_content == target_content:
-					dir.list_dir_end()
-					return current_relative_path
-			file_name = dir.get_next()
-		return ""
+	if dir.open(directory_path) != OK:
+		return null
+	dir.list_dir_begin(true)
+	var file_name = dir.get_next()
+	while file_name != "":
+		var full_path = directory_path.plus_file(file_name)
+		var current_relative_path = relative_path.plus_file(file_name)
+		if dir.current_is_dir():
+			var found_path = find_file_duplicate(full_path, target_name, target_content, current_relative_path)
+			if found_path != "":
+				dir.list_dir_end()
+				return found_path
+		if file_name == target_name:
+			var file = File.new()
+			file.open(full_path, File.READ)
+			var file_content = file.get_buffer(file.get_len())
+			file.close()
+			if file_content == target_content:
+				dir.list_dir_end()
+				return current_relative_path
+		file_name = dir.get_next()
+	return null
 
-static func find_image_duplicates(file_path: String, destintation_dir: String) -> String:
-	# These are all supported file types in Godot that are not supported
-	# by other marker programs. "jpg", "jpeg", "bmp", "tga"
+static func find_image_duplicates(file_path: String, destintation_dir: String):
 	var file_name: String = file_path.get_file()
 	var file_extension: String = file_name.get_extension().to_lower()
 	if not file_extension == "png":