Make csv_rows method private and remove tests

app/models/block/statistics.rb

@@ -51,16 +51,16 @@ def rows
       rows
     end
 
-    def csv_rows
-      CSV.read(csv_file_path, headers: true).map(&:to_h)
-    end
-
     def data_source_link
       data["data_source_link"]
     end
 
   private
 
+    def csv_rows
+      CSV.read(csv_file_path, headers: true).map(&:to_h)
+    end
+
     def csv_file_path
       @csv_file_path ||= Rails.root.join("#{STATISTICS_DATA_PATH}/#{data['csv_file']}")
     end

spec/models/block/statistics_spec.rb

@@ -42,21 +42,6 @@
   end
 
   describe "chart data" do
-    describe "#csv_rows" do
-      it "returns the row data for the chart" do
-        expected_rows = [
-          { "Date" => "2024-01-01", "value" => "10", "variable" => "variable_name" },
-          { "Date" => "2024-02-01", "value" => "11", "variable" => "variable_name" },
-          { "Date" => "2024-03-01", "value" => "12", "variable" => "variable_name" },
-          { "Date" => "2024-04-01", "value" => "13", "variable" => "variable_name" },
-          { "Date" => "2024-05-01", "value" => "14", "variable" => "variable_name" },
-          { "Date" => "2024-06-01", "value" => "15", "variable" => "variable_name" },
-        ]
-
-        expect(described_class.new(blocks_hash).csv_rows).to eq(expected_rows)
-      end
-    end
-
     describe "#data_source_link" do
       it "returns the link to the external data source" do
         expect(described_class.new(blocks_hash).data_source_link).to eq("https://www.example.com")