Do not require eglot at compile time

This fixes #46, reverts c18023132d.
Moved eglot-related functions into a
(eval-and-compile (when (require 'eglot nil t))) form.

* eldoc-box.el (require): Remove eglot requires.

eldoc-box.el

@@ -40,11 +40,6 @@
 (require 'cl-lib)
 (require 'seq)
 
-;; https://www.gnu.org/software/emacs/manual/html_node/elisp/Compiling-Macros.html
-(eval-when-compile
-  (require 'jsonrpc)
-  (require 'eglot))
-
 ;;;; Userland
 ;;;;; Variable
 (defgroup eldoc-box nil
@@ -451,6 +446,9 @@ You can use \[keyboard-quit] to hide the doc."
 
 ;;;; Eglot helper
 
+(eval-and-compile
+  (require 'jsonrpc)
+  (when (require 'eglot nil t)
     (defvar eldoc-box-eglot-help-at-point-last-point 0
       "This point cache is used by clean up function.
 If (point) != last point, cleanup frame.")
@@ -487,7 +485,7 @@ If (point) != last point, cleanup frame.")
                 (eldoc-box--display hover-info)
               (eglot--error "No hover info here"))))
         (setq eldoc-box-eglot-help-at-point-last-point (point))
-    (run-with-timer 0.1 nil #'eldoc-box--eglot-help-at-point-cleanup)))
+        (run-with-timer 0.1 nil #'eldoc-box--eglot-help-at-point-cleanup)))))
 
 ;;;; Comany compatibility
 ;;