Remove number_of_rows from Column

The number of rows in the stripe that the column belongs to does not
accurately represent the number of rows in that column. Consider nested
types within compound types.

src/column.rs

@@ -31,23 +31,14 @@ use crate::stripe::Stripe;
 
 #[derive(Clone, Debug)]
 pub struct Column {
-    number_of_rows: u64,
     footer: Arc<StripeFooter>,
     name: String,
     data_type: DataType,
 }
 
 impl Column {
-    pub fn new(
-        name: &str,
-        data_type: &DataType,
-        footer: &Arc<StripeFooter>,
-        // TODO: inaccurate to grab this from stripe; consider list types
-        //       (inner list will have more values/rows than in actual stripe)
-        number_of_rows: u64,
-    ) -> Self {
+    pub fn new(name: &str, data_type: &DataType, footer: &Arc<StripeFooter>) -> Self {
         Self {
-            number_of_rows,
             footer: footer.clone(),
             data_type: data_type.clone(),
             name: name.to_string(),
@@ -98,15 +89,13 @@ impl Column {
             DataType::Struct { children, .. } => children
                 .iter()
                 .map(|col| Column {
-                    number_of_rows: self.number_of_rows,
                     footer: self.footer.clone(),
                     name: col.name().to_string(),
                     data_type: col.data_type().clone(),
                 })
                 .collect(),
             DataType::List { child, .. } => {
                 vec![Column {
-                    number_of_rows: self.number_of_rows,
                     footer: self.footer.clone(),
                     name: "item".to_string(),
                     data_type: *child.clone(),
@@ -115,13 +104,11 @@ impl Column {
             DataType::Map { key, value, .. } => {
                 vec![
                     Column {
-                        number_of_rows: self.number_of_rows,
                         footer: self.footer.clone(),
                         name: "key".to_string(),
                         data_type: *key.clone(),
                     },
                     Column {
-                        number_of_rows: self.number_of_rows,
                         footer: self.footer.clone(),
                         name: "value".to_string(),
                         data_type: *value.clone(),
@@ -134,7 +121,6 @@ impl Column {
                     .iter()
                     .enumerate()
                     .map(|(index, data_type)| Column {
-                        number_of_rows: self.number_of_rows,
                         footer: self.footer.clone(),
                         name: format!("{index}"),
                         data_type: data_type.clone(),

src/stripe.rs

@@ -142,7 +142,7 @@ impl Stripe {
         let columns = projected_data_type
             .children()
             .iter()
-            .map(|col| Column::new(col.name(), col.data_type(), &footer, info.number_of_rows()))
+            .map(|col| Column::new(col.name(), col.data_type(), &footer))
             .collect();
 
         let mut stream_map = HashMap::new();
@@ -195,7 +195,7 @@ impl Stripe {
         let columns = projected_data_type
             .children()
             .iter()
-            .map(|col| Column::new(col.name(), col.data_type(), &footer, info.number_of_rows()))
+            .map(|col| Column::new(col.name(), col.data_type(), &footer))
             .collect();
 
         let mut stream_map = HashMap::new();