store: remove rotate_memtable as could be the root cause of the issue

crates/brk_store/src/lib.rs

@@ -277,10 +277,6 @@ where
         Ok(())
     }
 
-    fn rotate_memtable(&self) {
-        let _ = self.partition.as_ref().unwrap().inner().rotate_memtable();
-    }
-
     fn height(&self) -> Option<Height> {
         self.meta.height()
     }

crates/brk_store/src/trait.rs

@@ -9,8 +9,6 @@ pub trait AnyStore {
 
     fn name(&self) -> &'static str;
 
-    fn rotate_memtable(&self);
-
     fn height(&self) -> Option<Height>;
 
     fn has(&self, height: Height) -> bool;