Dont expand cwd=current in rc launch

This is easily done at the command line. And its semantics are
are to refer to cwd of active window.

kitty/launch.py

@@ -96,8 +96,6 @@ def options_spec() -> str:
 oldest foreground process associated with the currently active window rather
 than the newest foreground process. Finally, the special value :code:`root`
 refers to the process that was originally started when the window was created.
-When running via remote control a value of current uses the working directory
-for the remote control invocation.
 
 
 --env

kitty/rc/launch.py

@@ -21,7 +21,7 @@ class Launch(RemoteCommand):
     args+/list.str: The command line to run in the new window, as a list, use an empty list to run the default shell
     match/str: The tab to open the new window in
     window_title/str: Title for the new window
-    cwd/str=copy_local_cwd: Working directory for the new window
+    cwd/str: Working directory for the new window
     env/list.str: List of environment variables of the form NAME=VALUE
     var/list.str: List of user variables of the form NAME=VALUE
     tab_title/str: Title for the new tab

tools/cmd/at/launch.go

@@ -15,12 +15,3 @@ func copy_local_env(copy_env bool) []string {
 	}
 	return nil
 }
-
-func copy_local_cwd(copy_cwd string) string {
-	if copy_cwd == "current" {
-		if c, e := os.Getwd(); e == nil {
-			copy_cwd = c
-		}
-	}
-	return copy_cwd
-}