refactor: remove the write_buffer crate dependency from ioxd_querier (#5563)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Cargo.lock

@@ -2462,7 +2462,6 @@ dependencies = [
  "tonic",
  "trace",
  "workspace-hack",
- "write_buffer",
 ]
 
 [[package]]

ioxd_querier/Cargo.toml

@@ -20,7 +20,6 @@ service_grpc_influxrpc = { path = "../service_grpc_influxrpc" }
 sharder = { path = "../sharder" }
 iox_time = { path = "../iox_time" }
 trace = { path = "../trace" }
-write_buffer = { path = "../write_buffer" }
 
 # Crates.io dependencies, in alphabetical order
 arrow-flight = "21.0.0"

ioxd_querier/src/lib.rs

@@ -152,12 +152,6 @@ pub struct QuerierServerTypeArgs<'a> {
 
 #[derive(Debug, Error)]
 pub enum Error {
-    #[error("failed to initialise write buffer connection: {0}")]
-    WriteBuffer(#[from] write_buffer::core::WriteBufferError),
-
-    #[error("failed to create ShardIndex from id: {0}")]
-    InvalidData(#[from] std::num::TryFromIntError),
-
     #[error("querier error: {0}")]
     Querier(#[from] querier::QuerierDatabaseError),
 }