Revert "Add GET endpoints for getting the state of the finder"

This reverts commit 750b2a6313.

This can cause a deadlock if the endpoints are accessed in the core event
loop via execute action.

  fzf --listen 6266 --bind 'space:execute:curl localhost:6266'

Technically, there's no reason to use the API because the information is
already available via `{}` and `{q}`, but I'd like to completely remove
the risk of misuse.

src/terminal.go

@@ -201,8 +201,7 @@ type Terminal struct {
 	sigstop            bool
 	startChan          chan fitpad
 	killChan           chan int
-	serverRequestChan  chan []*action
-	serverResponseChan chan string
+	serverChan         chan []*action
 	slab               *util.Slab
 	theme              *tui.ColorTheme
 	tui                tui.Renderer
@@ -277,7 +276,6 @@ const (
 	actDeleteChar
 	actDeleteCharEOF
 	actEndOfLine
-	actEvaluate
 	actForwardChar
 	actForwardWord
 	actKillLine
@@ -601,8 +599,7 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 		theme:              opts.Theme,
 		startChan:          make(chan fitpad, 1),
 		killChan:           make(chan int),
-		serverRequestChan:  make(chan []*action),
-		serverResponseChan: make(chan string),
+		serverChan:         make(chan []*action),
 		tui:                renderer,
 		initFunc:           func() { renderer.Init() },
 		executing:          util.NewAtomicBool(false)}
@@ -624,7 +621,7 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 		t.separator, t.separatorLen = t.ansiLabelPrinter(bar, &tui.ColSeparator, true)
 	}
 
-	if err := startHttpServer(t.listenPort, t.serverRequestChan, t.serverResponseChan); err != nil {
+	if err := startHttpServer(t.listenPort, t.serverChan); err != nil {
 		errorExit(err.Error())
 	}
 
@@ -2534,7 +2531,7 @@ func (t *Terminal) Loop() {
 			select {
 			case event = <-eventChan:
 				needBarrier = true
-			case actions = <-t.serverRequestChan:
+			case actions = <-t.serverChan:
 				event = tui.Invalid.AsEvent()
 				needBarrier = false
 			}
@@ -2617,15 +2614,6 @@ func (t *Terminal) Loop() {
 				t.executeCommand(a.a, false, a.t == actExecuteSilent)
 			case actExecuteMulti:
 				t.executeCommand(a.a, true, false)
-			case actEvaluate:
-				response := ""
-				switch a.a {
-				case "", "current":
-					response = t.currentItem().AsString(t.ansi)
-				case "query":
-					response = string(t.input)
-				}
-				t.serverResponseChan <- response
 			case actInvalid:
 				t.mutex.Unlock()
 				return false