remove browse mode and code that became dead as a result of its removal, because the new plan is to launch the program from the terminal (and terminal navigation is okay)

imperative-shell/file-thread.sml

@@ -45,36 +45,6 @@ struct
       TextIO.closeOut io
     end
 
-  fun getDirList (dir, acc, rootPath) =
-    case OS.FileSys.readDir dir of
-      SOME path =>
-        let
-          val folderPath = String.concat [rootPath, "/", path]
-        in
-          if OS.FileSys.isDir folderPath then
-            getDirList (dir, AppType.IS_FOLDER path :: acc, rootPath)
-          else if OS.FileSys.isLink folderPath then
-            getDirList (dir, acc, rootPath)
-          else
-            getDirList (dir, AppType.IS_FILE path :: acc, rootPath)
-        end
-    | NONE => let val acc = List.rev acc in Vector.fromList acc end
-
-  fun loadFiles (path, inputMailbox) =
-    let
-      val path = if String.size path = 0 then OS.FileSys.getDir () else path
-      val dir = OS.FileSys.openDir path
-      val dirList = getDirList (dir, [], path)
-      val _ = OS.FileSys.closeDir dir
-      val inputMsg = FILE_BROWSER_AND_PATH {fileBrowser = dirList, path = path}
-    in
-      Mailbox.send (inputMailbox, inputMsg)
-    end
-
-  fun selectPath (path, inputMailbox) =
-    if OS.FileSys.isDir path then loadFiles (path, inputMailbox)
-    else loadSquares (path, inputMailbox)
-
   fun run (fileMailbox, inputMailbox) =
     let
       val _ =
@@ -83,8 +53,6 @@ struct
         | EXPORT_SQUARES str => saveString (exportFilename, str)
         | EXPORT_COLLISIONS str => saveString (collisionFilename, str)
         | LOAD_SQUARES => loadSquares (filename, inputMailbox)
-        | LOAD_FILES path => loadFiles (path, inputMailbox)
-        | SELECT_PATH path => selectPath (path, inputMailbox)
     in
       run (fileMailbox, inputMailbox)
     end

imperative-shell/input-callbacks.sml

@@ -128,10 +128,6 @@ struct
       andalso mods = 0x0
     then
       Mailbox.send (mailbox, KEY_SPACE)
-    else if
-      key = Input.KEY_O () andalso action = Input.PRESS () andalso mods = 0x02
-    then
-      Mailbox.send (mailbox, KEY_CTRL_O)
     else if
       key = Input.KEY_0 () andalso action = Input.PRESS () andalso mods = 0
     then