[gdk-pixbuf/no-x11-opt] Remove unused x11 configuration option

[Emmanuele Bassi <ebassi src gnome org>]

commit 7a3b8612300282d33d4c11bbec4c7aea411a4490
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Jan 7 12:27:41 2020 +0000

    Remove unused x11 configuration option
    
    Now that gdk-pixbuf-xlib has been moved out of tree into its own
    repository, we can drop the `x11` build configuration option.

 README.msvc       | 2 +-
 docs/meson.build  | 4 ----
 meson.build       | 1 -
 meson_options.txt | 4 ----
 4 files changed, 1 insertion(+), 10 deletions(-)
---
diff --git a/README.msvc b/README.msvc
index b39551a57..dbac333a2 100644
--- a/README.msvc
+++ b/README.msvc
@@ -34,7 +34,7 @@ part of the dependency's build process.
 Set the PATH, LIB, INCLUDE and PKG_CONFIG_PATH environmental variables as
 needed.  Run the following in a Visual Studio command prompt:
 
-python $(PATH_TO_meson.py)\meson.py $(GDK_PIXBUF_SRCDIR) --builldtype=$(BUILD_CONFIG) --prefix=$(PREFIX) 
-Dman=false -Dx11=false $(OTHER_OPTIONS)
+python $(PATH_TO_meson.py)\meson.py $(GDK_PIXBUF_SRCDIR) --buildtype=$(BUILD_CONFIG) --prefix=$(PREFIX) 
-Dman=false $(OTHER_OPTIONS)
 
 For $(OTHER_OPTIONS), the following may be of interest, besides the png,
 jpeg, japer and tiff options.  Prefix each option with -D:
diff --git a/docs/meson.build b/docs/meson.build
index 0311e01d2..4615bfaad 100644
--- a/docs/meson.build
+++ b/docs/meson.build
@@ -32,10 +32,6 @@ private_headers = [
   'lzw.h',
 ]
 
-if not get_option('x11')
-  private_headers += 'contrib'
-endif
-
 if get_option('docs')
   gnome.gtkdoc('gdk-pixbuf',
                main_xml: 'gdk-pixbuf.xml',
diff --git a/meson.build b/meson.build
index 0c725d8ae..6aebaed1d 100644
--- a/meson.build
+++ b/meson.build
@@ -447,7 +447,6 @@ summary = [
   '    documentation: @0@'.format(get_option('docs')),
   '        man pages: @0@'.format(get_option('man')),
   '    introspection: @0@'.format(get_option('gir')),
-  '              x11: @0@'.format(get_option('x11')),
   '  installed tests: @0@'.format(get_option('installed_tests')),
   '      relocatable: @0@'.format(get_option('relocatable')),
   '',
diff --git a/meson_options.txt b/meson_options.txt
index a7c33a869..1add5a86b 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -14,10 +14,6 @@ option('jasper',
        description: 'Enable JPEG2000 loader (requires libjasper)',
        type: 'boolean',
        value: false)
-option('x11',
-       description: 'Enable X11 support (requires libX11)',
-       type: 'boolean',
-       value: true)
 option('builtin_loaders',
        description: 'Comma-separated list of loaders to build into gdk-pixbuf, or "none", or "all" to build 
all buildable loaders into gdk-pixbuf',
        type: 'string',