Remove never-used client parameter from message handler functions (#13406)

Every single client-side RPC message handler function took an unused
`Arc<Client>` parameter. This removes that.

Release Notes:

- N/A

crates/channel/src/channel_buffer.rs

@@ -138,7 +138,6 @@ impl ChannelBuffer {
     async fn handle_update_channel_buffer(
         this: Model<Self>,
         update_channel_buffer: TypedEnvelope<proto::UpdateChannelBuffer>,
-        _: Arc<Client>,
         mut cx: AsyncAppContext,
     ) -> Result<()> {
         let ops = update_channel_buffer
@@ -160,7 +159,6 @@ impl ChannelBuffer {
     async fn handle_update_channel_buffer_collaborators(
         this: Model<Self>,
         message: TypedEnvelope<proto::UpdateChannelBufferCollaborators>,
-        _: Arc<Client>,
         mut cx: AsyncAppContext,
     ) -> Result<()> {
         this.update(&mut cx, |this, cx| {

crates/channel/src/channel_chat.rs

@@ -528,7 +528,6 @@ impl ChannelChat {
     async fn handle_message_sent(
         this: Model<Self>,
         message: TypedEnvelope<proto::ChannelMessageSent>,
-        _: Arc<Client>,
         mut cx: AsyncAppContext,
     ) -> Result<()> {
         let user_store = this.update(&mut cx, |this, _| this.user_store.clone())?;
@@ -553,7 +552,6 @@ impl ChannelChat {
     async fn handle_message_removed(
         this: Model<Self>,
         message: TypedEnvelope<proto::RemoveChannelMessage>,
-        _: Arc<Client>,
         mut cx: AsyncAppContext,
     ) -> Result<()> {
         this.update(&mut cx, |this, cx| {
@@ -565,7 +563,6 @@ impl ChannelChat {
     async fn handle_message_updated(
         this: Model<Self>,
         message: TypedEnvelope<proto::ChannelMessageUpdate>,
-        _: Arc<Client>,
         mut cx: AsyncAppContext,
     ) -> Result<()> {
         let user_store = this.update(&mut cx, |this, _| this.user_store.clone())?;

crates/channel/src/channel_store.rs

@@ -888,7 +888,6 @@ impl ChannelStore {
     async fn handle_update_channels(
         this: Model<Self>,
         message: TypedEnvelope<proto::UpdateChannels>,
-        _: Arc<Client>,
         mut cx: AsyncAppContext,
     ) -> Result<()> {
         this.update(&mut cx, |this, _| {
@@ -902,7 +901,6 @@ impl ChannelStore {
     async fn handle_update_user_channels(
         this: Model<Self>,
         message: TypedEnvelope<proto::UpdateUserChannels>,
-        _: Arc<Client>,
         mut cx: AsyncAppContext,
     ) -> Result<()> {
         this.update(&mut cx, |this, cx| {