Remove theme.h and preview-widget.h from the API docs

As they are of no use to plugins and to be removed in the future

https://bugzilla.gnome.org/show_bug.cgi?id=695935

doc/reference/Makefile.am

@@ -94,6 +94,7 @@ IGNORE_HFILES= \
 	mutter-enum-types.h \
 	mutter-Xatomtype.h \
 	place.h \
+	preview-widget.h \
 	region-utils.h \
 	resizepopup.h \
 	screen-private.h \
@@ -102,6 +103,7 @@ IGNORE_HFILES= \
 	stack-tracker.h \
 	stamp-mutter-enum-types.h \
 	tabpopup.h \
+	theme.h \
 	theme-private.h \
 	tile-preview.h \
 	ui.h \

doc/reference/meta-docs.sgml.in

@@ -37,9 +37,7 @@
     <xi:include href="xml/meta-shadow-factory.xml"/>
     <xi:include href="xml/meta-shaped-texture.xml"/>
     <xi:include href="xml/meta-window-actor.xml"/>
-    <xi:include href="xml/preview-widget.xml"/>
     <xi:include href="xml/screen.xml"/>
-    <xi:include href="xml/theme.xml"/>
     <xi:include href="xml/window.xml"/>
     <xi:include href="xml/workspace.xml"/>
   </part>

doc/reference/meta-sections.txt

@@ -452,29 +452,6 @@ MetaKeyHandler
 meta_key_binding_get_type
 </SECTION>
 
-<SECTION>
-<FILE>preview-widget</FILE>
-<TITLE>MetaPreview</TITLE>
-MetaPreview
-MetaPreviewClass
-meta_preview_new
-meta_preview_set_theme
-meta_preview_set_title
-meta_preview_set_frame_type
-meta_preview_set_frame_flags
-meta_preview_set_button_layout
-meta_preview_get_icon
-meta_preview_get_mini_icon
-<SUBSECTION Standard>
-META_IS_PREVIEW
-META_IS_PREVIEW_CLASS
-META_PREVIEW
-META_PREVIEW_CLASS
-META_PREVIEW_GET_CLASS
-META_TYPE_PREVIEW
-meta_preview_get_type
-</SECTION>
-
 <SECTION>
 <FILE>screen</FILE>
 MetaScreen
@@ -514,17 +491,6 @@ META_TYPE_SCREEN
 meta_screen_get_type
 </SECTION>
 
-<SECTION>
-<FILE>theme</FILE>
-meta_theme_get_current
-meta_theme_set_current
-meta_theme_new
-meta_theme_free
-meta_theme_validate
-meta_theme_load
-MetaTheme
-</SECTION>
-
 <SECTION>
 <FILE>util</FILE>
 meta_is_verbose

src/ui/preview-widget.c

@@ -19,7 +19,7 @@
  * 02111-1307, USA.
  */
 
-/**
+/*
  * SECTION:preview-widget
  * @title: MetaPreview
  * @short_description: Mutter theme preview widget

src/ui/theme.c

@@ -19,7 +19,7 @@
  * 02111-1307, USA.
  */
 
-/**
+/*
  * SECTION:theme
  * @title: MetaTheme
  * @short_description: Metacity Theme Rendering