node: Make 'graphman config pools' work again

Code that unconditionally set the pool size for graphman to 5 snuck
in. Remove that code since the code right after that handles using only a
small number of connections from `graphman` more intelligently and in a way
that lest 'graphman config pools' still work.

Author: lutter

node/src/bin/manager.rs

@@ -1150,11 +1150,6 @@ async fn main() -> anyhow::Result<()> {
     );
 
     let mut config = Cfg::load(&logger, &opt.clone().into()).context("Configuration error")?;
-    config.stores.iter_mut().for_each(|(_, shard)| {
-        shard.pool_size = PoolSize::Fixed(5);
-        shard.fdw_pool_size = PoolSize::Fixed(5);
-    });
-
     if opt.pool_size > 0 && !opt.cmd.use_configured_pool_size() {
         // Override pool size from configuration
         for shard in config.stores.values_mut() {