cuepls: slim down to single format command

For now we are maintaining cmd/cuepls as a separate binary from cmd/cue.
In later changes we might merge the former into the latter to create a
single entry point for doing all things CUE. Doing so will require quite
a lot of open heart surgery on cmd/cuepls, to adapt/move away from the
existing flag-based approach to commands and subcommands. cmd/cue (as a
reminder) uses cobra, and the two are not compatible at least as far as
UX is concerned. It also complicates code/flag handling.

In order to create a minimal working end-to-end cuepls command with
integration tests, we only need a serve command for now. Therefore
remove all other commands to limit the surface area of cmd/cuepls
exposed.

For #142

Signed-off-by: Paul Jolly <[email protected]>
Change-Id: Ic6e6d933a12d43a1fee69a7505eaaf23870a453f
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1174169
Unity-Result: CUE porcuepine <[email protected]>
TryBot-Result: CUEcueckoo <[email protected]>
Reviewed-by: Daniel Martí <[email protected]>

internal/golangorgx/gopls/cmd/cmd.go

@@ -277,29 +277,9 @@ func (app *Application) internalCommands() []tool.Application {
 
 func (app *Application) featureCommands() []tool.Application {
 	return []tool.Application{
-		&callHierarchy{app: app},
-		&check{app: app},
-		&codelens{app: app},
-		&definition{app: app},
-		&execute{app: app},
-		&foldingRanges{app: app},
 		&format{app: app},
-		&highlight{app: app},
-		&implementation{app: app},
-		&imports{app: app},
 		newRemote(app, ""),
 		newRemote(app, "inspect"),
-		&links{app: app},
-		&prepareRename{app: app},
-		&references{app: app},
-		&rename{app: app},
-		&semtok{app: app},
-		&signature{app: app},
-		&stats{app: app},
-		&suggestedFix{app: app},
-		&symbols{app: app},
-
-		&workspaceSymbol{app: app},
 	}
 }