collab: Remove code for embeddings (#29310)

This PR removes the embeddings-related code from collab and the
protocol, as we weren't using it anywhere.

Release Notes:

- N/A

crates/proto/proto/ai.proto

@@ -188,26 +188,3 @@ enum LanguageModelProvider {
     Google = 2;
     Zed = 3;
 }
-
-message GetCachedEmbeddings {
-    string model = 1;
-    repeated bytes digests = 2;
-}
-
-message GetCachedEmbeddingsResponse {
-    repeated Embedding embeddings = 1;
-}
-
-message ComputeEmbeddings {
-    string model = 1;
-    repeated string texts = 2;
-}
-
-message ComputeEmbeddingsResponse {
-    repeated Embedding embeddings = 1;
-}
-
-message Embedding {
-    bytes digest = 1;
-    repeated float dimensions = 2;
-}

crates/proto/proto/zed.proto

@@ -208,10 +208,6 @@ message Envelope {
 
         CountLanguageModelTokens count_language_model_tokens = 230;
         CountLanguageModelTokensResponse count_language_model_tokens_response = 231;
-        GetCachedEmbeddings get_cached_embeddings = 189;
-        GetCachedEmbeddingsResponse get_cached_embeddings_response = 190;
-        ComputeEmbeddings compute_embeddings = 191;
-        ComputeEmbeddingsResponse compute_embeddings_response = 192;
 
         UpdateChannelMessage update_channel_message = 170;
         ChannelMessageUpdate channel_message_update = 171;
@@ -394,6 +390,7 @@ message Envelope {
     reserved 166 to 169;
     reserved 177 to 185;
     reserved 188;
+    reserved 189 to 192;
     reserved 193 to 195;
     reserved 197;
     reserved 200 to 202;

crates/proto/src/proto.rs

@@ -49,8 +49,6 @@ messages!(
     (ChannelMessageUpdate, Foreground),
     (CloseBuffer, Foreground),
     (Commit, Background),
-    (ComputeEmbeddings, Background),
-    (ComputeEmbeddingsResponse, Background),
     (CopyProjectEntry, Foreground),
     (CountLanguageModelTokens, Background),
     (CountLanguageModelTokensResponse, Background),
@@ -82,8 +80,6 @@ messages!(
     (FormatBuffers, Foreground),
     (FormatBuffersResponse, Foreground),
     (FuzzySearchUsers, Foreground),
-    (GetCachedEmbeddings, Background),
-    (GetCachedEmbeddingsResponse, Background),
     (GetChannelMembers, Foreground),
     (GetChannelMembersResponse, Foreground),
     (GetChannelMessages, Background),
@@ -319,7 +315,6 @@ request_messages!(
     (CancelCall, Ack),
     (Commit, Ack),
     (CopyProjectEntry, ProjectEntryResponse),
-    (ComputeEmbeddings, ComputeEmbeddingsResponse),
     (CreateChannel, CreateChannelResponse),
     (CreateProjectEntry, ProjectEntryResponse),
     (CreateRoom, CreateRoomResponse),
@@ -332,7 +327,6 @@ request_messages!(
     (ApplyCodeActionKind, ApplyCodeActionKindResponse),
     (FormatBuffers, FormatBuffersResponse),
     (FuzzySearchUsers, UsersResponse),
-    (GetCachedEmbeddings, GetCachedEmbeddingsResponse),
     (GetChannelMembers, GetChannelMembersResponse),
     (GetChannelMessages, GetChannelMessagesResponse),
     (GetChannelMessagesById, GetChannelMessagesResponse),