Fix minor Makefile.am issues arising from 943384d7c3.

Commit 943384d7c3 removed two directories in the doc/ tree and
those directories had to be removed from the Makefile.ams one
level up.

configure.ac

@@ -487,8 +487,6 @@ AC_CONFIG_FILES([ \
 	doc/Makefile \
 	doc/html/Makefile \
 	doc/html/images/Makefile \
-	doc/html/images/hw/Makefile \
-	doc/html/ru/Makefile \
 	m4/Makefile \
 	man/Makefile \
 	test/common.sh \

doc/html/Makefile.am

@@ -16,7 +16,7 @@
 #  restrictive of those mentioned above.  See the file COPYING.Xiph in this
 #  distribution.
 
-SUBDIRS = ru images
+SUBDIRS = images
 
 docdir = $(datadir)/doc/$(PACKAGE)-$(VERSION)/html
 

doc/html/images/Makefile.am

@@ -16,8 +16,6 @@
 #  restrictive of those mentioned above.  See the file COPYING.Xiph in this
 #  distribution.
 
-SUBDIRS = hw
-
 docdir = $(datadir)/doc/$(PACKAGE)-$(VERSION)/html/images
 
 doc_DATA = \