No-op (lsp) if already enabled #3390

`lsp-deferred` calls `lsp` and `lsp` seems to do something expensive
whether or not lsp-mode is already active. Over TRAMP, this is much too
expensive, so we no-op lsp-deferred if lsp-mode is already active.

modules/tools/lsp/autoload/common.el

@@ -6,4 +6,5 @@
   (interactive)
   (if (featurep! +eglot)
       (eglot-ensure)
-    (lsp-deferred)))
+    (unless (bound-and-true-p lsp-mode)
+      (lsp-deferred))))