gnu: emacs-exwm: Update to 0.20.

* gnu/packages/emacs.scm (emacs-exwm): Update to 0.20.
[source]: Remove emacs-exwm-fix-fullscreen-issue.patch.
* gnu/local.mk (dist_patch_DATA): Remove patch.
* gnu/packages/patches/emacs-exwm-fix-fullscreen-issue.patch: Remove patch.

gnu/local.mk

@@ -659,7 +659,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/elogind-glibc-2.27.patch			\
   %D%/packages/patches/einstein-build.patch			\
   %D%/packages/patches/emacs-exec-path.patch			\
-  %D%/packages/patches/emacs-exwm-fix-fullscreen-issue.patch	\
   %D%/packages/patches/emacs-fix-scheme-indent-function.patch	\
   %D%/packages/patches/emacs-json-reformat-fix-tests.patch	\
   %D%/packages/patches/emacs-highlight-stages-add-gexp.patch	\

gnu/packages/emacs.scm

@@ -6615,7 +6615,7 @@ It should enable you to implement low-level X11 applications.")
 (define-public emacs-exwm
   (package
     (name "emacs-exwm")
-    (version "0.19")
+    (version "0.20")
     (synopsis "Emacs X window manager")
     (source (origin
               (method url-fetch)
@@ -6623,8 +6623,7 @@ It should enable you to implement low-level X11 applications.")
                                   version ".tar"))
               (sha256
                (base32
-                "11xd2w4h3zdwkdxypvmcz8s7q72cn76lfr9js77jbizyj6b04lr0"))
-              (patches (search-patches "emacs-exwm-fix-fullscreen-issue.patch"))))
+                "0nhhzbkm0mkj7sd1dy2c19cmn56gyaj9nl8kgy86h4fp63hjaz04"))))
     (build-system emacs-build-system)
     (propagated-inputs
      `(("emacs-xelb" ,emacs-xelb)))

gnu/packages/patches/emacs-exwm-fix-fullscreen-issue.patch

@@ -1,27 +0,0 @@
-From 13a14579cc1bb772735f895dd5b4b90c6812f3ee Mon Sep 17 00:00:00 2001
-From: Chris Feng <chris.w.feng@gmail.com>
-Date: Sun, 29 Jul 2018 00:00:00 +0000
-Subject: [PATCH] Fix issues with destroying full screen X windows
-
-* exwm-manage.el (exwm-manage--unmanage-window): Set the Emacs window
-of an full screen X window as non-dedicated before killing its buffer
-so as not to cause other side effects.
----
- exwm-manage.el | 4 ++++
- 1 file changed, 4 insertions(+)
-
-diff --git a/exwm-manage.el b/exwm-manage.el
-index a0a9e05..349157f 100644
---- a/exwm-manage.el
-+++ b/exwm-manage.el
-@@ -392,6 +392,10 @@ manager is shutting down."
-                                :window window :parent exwm--root :x 0 :y 0))
-             (xcb:+request exwm--connection
-                 (make-instance 'xcb:DestroyWindow :window container))))
-+        (when (exwm-layout--fullscreen-p)
-+          (let ((window (get-buffer-window)))
-+            (when window
-+              (set-window-dedicated-p window nil))))
-         (exwm-manage--set-client-list)
-         (xcb:flush exwm--connection))
-       (let ((kill-buffer-func