Drop unused document

diff --git a/docs/dev/lsp-features.md b/docs/dev/lsp-features.md
deleted file mode 100644 (file)
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-# Supported LSP features
-
-This list documents LSP features, supported by rust-analyzer.
-
-## General
-- [x] [initialize](https://microsoft.github.io/language-server-protocol/specification#initialize)
-- [x] [initialized](https://microsoft.github.io/language-server-protocol/specification#initialized)
-- [x] [shutdown](https://microsoft.github.io/language-server-protocol/specification#shutdown)
-- [ ] [exit](https://microsoft.github.io/language-server-protocol/specification#exit)
-- [x] [$/cancelRequest](https://microsoft.github.io/language-server-protocol/specification#cancelRequest)
-
-## Workspace
-- [ ] [workspace/workspaceFolders](https://microsoft.github.io/language-server-protocol/specification#workspace_workspaceFolders)
-- [ ] [workspace/didChangeWorkspaceFolders](https://microsoft.github.io/language-server-protocol/specification#workspace_didChangeWorkspaceFolders)
-- [x] [workspace/didChangeConfiguration](https://microsoft.github.io/language-server-protocol/specification#workspace_didChangeConfiguration)
-- [ ] [workspace/configuration](https://microsoft.github.io/language-server-protocol/specification#workspace_configuration)
-- [x] [workspace/didChangeWatchedFiles](https://microsoft.github.io/language-server-protocol/specification#workspace_didChangeWatchedFiles)
-- [x] [workspace/symbol](https://microsoft.github.io/language-server-protocol/specification#workspace_symbol)
-- [ ] [workspace/applyEdit](https://microsoft.github.io/language-server-protocol/specification#workspace_applyEdit)
-
-## Text Synchronization
-- [x] [textDocument/didOpen](https://microsoft.github.io/language-server-protocol/specification#textDocument_didOpen)
-- [x] [textDocument/didChange](https://microsoft.github.io/language-server-protocol/specification#textDocument_didChange)
-- [ ] [textDocument/willSave](https://microsoft.github.io/language-server-protocol/specification#textDocument_willSave)
-- [ ] [textDocument/willSaveWaitUntil](https://microsoft.github.io/language-server-protocol/specification#textDocument_willSaveWaitUntil)
-- [x] [textDocument/didSave](https://microsoft.github.io/language-server-protocol/specification#textDocument_didSave)
-- [x] [textDocument/didClose](https://microsoft.github.io/language-server-protocol/specification#textDocument_didClose)
-
-## Diagnostics
-- [x] [textDocument/publishDiagnostics](https://microsoft.github.io/language-server-protocol/specification#textDocument_publishDiagnostics)
-
-## Lanuguage Features
-- [x] [textDocument/completion](https://microsoft.github.io/language-server-protocol/specification#textDocument_completion)
- - open close: false
- - change: Full
- - will save: false
- - will save wait until: false
- - save: false
-- [x] [completionItem/resolve](https://microsoft.github.io/language-server-protocol/specification#completionItem_resolve)
- - resolve provider: none
- - trigger characters: `:`, `.`
-- [x] [textDocument/hover](https://microsoft.github.io/language-server-protocol/specification#textDocument_hover)
-- [x] [textDocument/signatureHelp](https://microsoft.github.io/language-server-protocol/specification#textDocument_signatureHelp)
- - trigger characters: `(`,  `,`
-- [ ] [textDocument/declaration](https://microsoft.github.io/language-server-protocol/specification#textDocument_declaration)
-- [x] [textDocument/definition](https://microsoft.github.io/language-server-protocol/specification#textDocument_definition)
-- [x] [textDocument/typeDefinition](https://microsoft.github.io/language-server-protocol/specification#textDocument_typeDefinition)
-- [x] [textDocument/implementation](https://microsoft.github.io/language-server-protocol/specification#textDocument_implementation)
-- [x] [textDocument/references](https://microsoft.github.io/language-server-protocol/specification#textDocument_references)
-- [x] [textDocument/documentHighlight](https://microsoft.github.io/language-server-protocol/specification#textDocument_documentHighlight)
-- [x] [textDocument/documentSymbol](https://microsoft.github.io/language-server-protocol/specification#textDocument_documentSymbol)
-- [x] [textDocument/codeAction](https://microsoft.github.io/language-server-protocol/specification#textDocument_codeAction)
-- [x] [textDocument/selectionRange](https://github.com/Microsoft/language-server-protocol/issues/613)
- - rust-analyzer.syntaxTree
- - rust-analyzer.matchingBrace
- - rust-analyzer.parentModule
- - rust-analyzer.joinLines
- - rust-analyzer.run
- - rust-analyzer.analyzerStatus
-- [x] [textDocument/codeLens](https://microsoft.github.io/language-server-protocol/specification#textDocument_codeLens)
-- [x] [codeLens/resolve](https://microsoft.github.io/language-server-protocol/specification#codeLens_resolve)
-- [ ] [documentLink/resolve](https://microsoft.github.io/language-server-protocol/specification#documentLink_resolve)
-- [ ] [textDocument/documentColor](https://microsoft.github.io/language-server-protocol/specification#textDocument_documentColor)
-- [ ] [textDocument/colorPresentation](https://microsoft.github.io/language-server-protocol/specification#textDocument_colorPresentation)
-- [x] [textDocument/formatting](https://microsoft.github.io/language-server-protocol/specification#textDocument_formatting)
-- [ ] [textDocument/rangeFormatting](https://microsoft.github.io/language-server-protocol/specification#textDocument_rangeFormatting)
-- [x] [textDocument/onTypeFormatting](https://microsoft.github.io/language-server-protocol/specification#textDocument_onTypeFormatting)
- - first trigger character: `=`
- - more trigger character `.`
-- [x] [textDocument/rename](https://microsoft.github.io/language-server-protocol/specification#textDocument_rename)
-- [x] [textDocument/prepareRename](https://microsoft.github.io/language-server-protocol/specification#textDocument_prepareRename)
-- [x] [textDocument/foldingRange](https://microsoft.github.io/language-server-protocol/specification#textDocument_foldingRange)