Remove logic for marking worktree entries as collapsed

crates/rpc/src/proto.rs

@@ -151,7 +151,6 @@ messages!(
     (DeleteProjectEntry, Foreground),
     (Error, Foreground),
     (ExpandProjectEntry, Foreground),
-    (CollapseProjectEntry, Foreground),
     (Follow, Foreground),
     (FollowResponse, Foreground),
     (FormatBuffers, Foreground),
@@ -258,7 +257,6 @@ request_messages!(
     (DeclineCall, Ack),
     (DeleteProjectEntry, ProjectEntryResponse),
     (ExpandProjectEntry, Ack),
-    (CollapseProjectEntry, Ack),
     (Follow, FollowResponse),
     (FormatBuffers, FormatBuffersResponse),
     (GetChannelMessages, GetChannelMessagesResponse),
@@ -316,7 +314,6 @@ entity_messages!(
     CreateProjectEntry,
     DeleteProjectEntry,
     ExpandProjectEntry,
-    CollapseProjectEntry,
     Follow,
     FormatBuffers,
     GetCodeActions,