[dia] Drop /doc/pl

[Zander <zbrown src gnome org>]

commit e47d2231265bff2309b4b61d224932d623902323
Author: Zander Brown <zbrown gnome org>
Date:   Mon May 27 11:20:04 2019 +0100

    Drop /doc/pl
    
    See https://gitlab.gnome.org/GNOME/dia/commit/c53e55baee506948fddad7ca5eb05ed835984c8f#note_518525

 doc/meson.build                     |   1 -
 doc/pl/authors.sgml                 |  41 -----
 doc/pl/authors.xml                  |  42 ------
 doc/pl/dia-manual.sgml              |  66 ---------
 doc/pl/dia-pl.omf                   |  36 -----
 doc/pl/dia.xml                      |  69 ---------
 doc/pl/graphics/greendots.png       | Bin 1371 -> 0 bytes
 doc/pl/graphics/home_network.png    | Bin 13904 -> 0 bytes
 doc/pl/graphics/line_props.png      | Bin 1700 -> 0 bytes
 doc/pl/html.xsl                     |  39 -----
 doc/pl/intro.sgml                   |  26 ----
 doc/pl/intro.xml                    |  27 ----
 doc/pl/license.sgml                 |  34 -----
 doc/pl/license.xml                  |  35 -----
 doc/pl/meson.build                  |  77 ----------
 doc/pl/topic.dat                    |   1 -
 doc/pl/usage-canvas.sgml            |  87 -----------
 doc/pl/usage-canvas.xml             |  88 -----------
 doc/pl/usage-customization.sgml     |  86 -----------
 doc/pl/usage-customization.xml      |  87 -----------
 doc/pl/usage-layers.sgml            | 235 -----------------------------
 doc/pl/usage-layers.xml             | 236 -----------------------------
 doc/pl/usage-loadsave.sgml          | 138 -----------------
 doc/pl/usage-loadsave.xml           | 139 -----------------
 doc/pl/usage-objects-selecting.sgml | 287 -----------------------------------
 doc/pl/usage-objects-selecting.xml  | 288 ------------------------------------
 doc/pl/usage-objects-special.sgml   | 135 -----------------
 doc/pl/usage-objects-special.xml    | 136 -----------------
 doc/pl/usage-objects.sgml           | 244 ------------------------------
 doc/pl/usage-objects.xml            | 245 ------------------------------
 doc/pl/usage-quickstart.sgml        | 155 -------------------
 doc/pl/usage-quickstart.xml         | 156 -------------------
 32 files changed, 3236 deletions(-)
---
diff --git a/doc/meson.build b/doc/meson.build
index 361f5e64..190ee305 100644
--- a/doc/meson.build
+++ b/doc/meson.build
@@ -15,4 +15,3 @@ subdir('de')
 subdir('en')
 subdir('eu')
 subdir('fr')
-subdir('pl')