Remove hosted projects (#19754)

Release Notes:

- N/A

crates/proto/proto/zed.proto

@@ -196,8 +196,6 @@ message Envelope {
         GetImplementation get_implementation = 162;
         GetImplementationResponse get_implementation_response = 163;
 
-        JoinHostedProject join_hosted_project = 164;
-
         CountLanguageModelTokens count_language_model_tokens = 230;
         CountLanguageModelTokensResponse count_language_model_tokens_response = 231;
         GetCachedEmbeddings get_cached_embeddings = 189;
@@ -292,6 +290,7 @@ message Envelope {
 
     reserved 87 to 88;
     reserved 158 to 161;
+    reserved 164;
     reserved 166 to 169;
     reserved 177 to 185;
     reserved 188;
@@ -523,11 +522,6 @@ message JoinProject {
     uint64 project_id = 1;
 }
 
-message JoinHostedProject {
-    uint64 project_id = 1;
-}
-
-
 message ListRemoteDirectory {
     uint64 dev_server_id = 1;
     string path = 2;
@@ -1294,13 +1288,7 @@ message UpdateChannels {
     repeated ChannelMessageId latest_channel_message_ids = 8;
     repeated ChannelBufferVersion latest_channel_buffer_versions = 9;
 
-    repeated HostedProject hosted_projects = 10;
-    repeated uint64 deleted_hosted_projects = 11;
-
-    reserved 12;
-    reserved 13;
-    reserved 14;
-    reserved 15;
+    reserved 10 to 15;
 }
 
 message UpdateUserChannels {
@@ -1329,13 +1317,6 @@ message ChannelParticipants {
     repeated uint64 participant_user_ids = 2;
 }
 
-message HostedProject {
-    uint64 project_id = 1;
-    uint64 channel_id = 2;
-    string name = 3;
-    ChannelVisibility visibility = 4;
-}
-
 message JoinChannel {
     uint64 channel_id = 1;
 }

crates/proto/src/proto.rs

@@ -228,7 +228,6 @@ messages!(
     (JoinChannelChat, Foreground),
     (JoinChannelChatResponse, Foreground),
     (JoinProject, Foreground),
-    (JoinHostedProject, Foreground),
     (JoinProjectResponse, Foreground),
     (JoinRoom, Foreground),
     (JoinRoomResponse, Foreground),
@@ -411,7 +410,6 @@ request_messages!(
     (JoinChannel, JoinRoomResponse),
     (JoinChannelBuffer, JoinChannelBufferResponse),
     (JoinChannelChat, JoinChannelChatResponse),
-    (JoinHostedProject, JoinProjectResponse),
     (JoinProject, JoinProjectResponse),
     (JoinRoom, JoinRoomResponse),
     (LeaveChannelBuffer, Ack),