Remove dot patch; I cannot seem to be able to trigger the bug anymore.

Let's see how it keeps rollingin bulks.

textproc/gi-docgen/Makefile

@@ -2,6 +2,7 @@ COMMENT=		documentation generator for GObject-based libraries
 
 GNOME_PROJECT=		gi-docgen
 GNOME_VERSION=		2022.2
+REVISION=		0
 
 # override gnome MODULE
 MASTER_SITES ?=         ${MASTER_SITE_GNOME:=sources/${GNOME_PROJECT}/${GNOME_VERSION:C/^([0-9]+)\..*/\1/}/}

textproc/gi-docgen/patches/patch-gidocgen_config_py

@@ -1,29 +0,0 @@
-XXX disable dot(1) because it can break when run under dpb(1).
-
-e.g.
-/usr/local/bin/gi-docgen generate --quiet --fatal-warnings \
-	--config doc/libgweather.toml --output-dir=doc/libgweather-4.0 \
-	--no-namespace-dir \
-	--content-dir=/hack/objdirs/pobj/libgweather4-4.0.0/libgweather-4.0.0/doc \
-	libgweather/GWeather-4.0.gir
-WARNING: Unable to process dot data: b'Fontconfig error:
-No writable cache directories\nFontconfig error: No writable cache directories\n'
-
-This happens if there's an empty directory under one of the fontconfig paths
-(most likely /usr/local/share/fonts/) which probably happens during dpb(1)
-junking (which is why it doesn't happen in every bulks).
-
-Index: gidocgen/config.py
---- gidocgen/config.py.orig
-+++ gidocgen/config.py
-@@ -161,9 +161,7 @@ class GIDocConfig:
- 
-     @property
-     def show_class_hierarchy(self):
--        if utils.find_program('dot') is None:
--            return False
--        return self.theme.get('show_class_hierarchy', False)
-+        return False
- 
-     def source_link(self, *args):
-         (filename, line) = args[0]