Add delete methods

src/database/raw.rs

@@ -48,4 +48,11 @@ impl<K: ?Sized + ZeroCopyByteWrapper, V: ?Sized + ZeroCopyByteWrapper> RawTable<
         )?;
         Ok(())
     }
+
+    /// Returns true if the key was present.
+    pub fn delete<'txn>(&self, txn: &Txn<'txn, RW>, k: impl AsRef<K>) -> anyhow::Result<bool> {
+        Ok(txn
+            .mdbx_txn
+            .del(self.borrow_mdbx_db(), k.as_ref().as_byte_slice(), None)?)
+    }
 }

src/database/wrapped.rs

@@ -45,4 +45,18 @@ impl<K: ByteWrapper, V: ByteWrapper> WrappedTable<K, V> {
         self.raw.put(txn, k_bytes, v_bytes)?;
         Ok(())
     }
+
+    /// Returns true if the key was present.
+    pub fn delete<'txn>(
+        &self,
+        txn: &Txn<'txn, RW>,
+        k: impl AsRef<K::Item>,
+    ) -> anyhow::Result<bool> {
+        let k_bytes = self
+            .k_wrapper
+            .dump_to_db_bytes(k.as_ref())
+            .context("whilst converting key to bytes")?;
+
+        self.raw.delete(txn, k_bytes)
+    }
 }