keyfile/build: don't build keyfile settings plugin as library

We directly include keyfile sources in NetworkManager by compiling
them into "libNetworkManager.la".

Drop unused libraries from the Makefile.

src/settings/plugins/keyfile/Makefile.am

@@ -1,48 +1 @@
-SUBDIRS = . tests
-
-@GNOME_CODE_COVERAGE_RULES@
-
-AM_CPPFLAGS = \
-	-I$(top_srcdir)/src \
-	-I$(top_srcdir)/src/settings \
-	-I$(top_srcdir)/shared \
-	-I$(top_builddir)/shared \
-	-I$(top_srcdir)/libnm-core \
-	-I$(top_builddir)/libnm-core \
-	-DG_LOG_DOMAIN=\""NetworkManager"\" \
-	-DNETWORKMANAGER_COMPILATION=NM_NETWORKMANAGER_COMPILATION_INSIDE_DAEMON \
-	$(GLIB_CFLAGS) \
-	-DNMCONFDIR=\"$(nmconfdir)\"
-
-noinst_LTLIBRARIES = \
-	libkeyfile-io.la \
-	libnm-settings-plugin-keyfile.la
-
-##### I/O library for testcases #####
-
-libkeyfile_io_la_SOURCES = \
-	nms-keyfile-reader.c \
-	nms-keyfile-reader.h \
-	nms-keyfile-writer.c \
-	nms-keyfile-writer.h \
-	nms-keyfile-utils.c \
-	nms-keyfile-utils.h
-
-libkeyfile_io_la_LIBADD = $(GLIB_LIBS)
-
-#####################################
-
-libnm_settings_plugin_keyfile_la_SOURCES = \
-	nms-keyfile-connection.c \
-	nms-keyfile-connection.h \
-	nms-keyfile-plugin.c \
-	nms-keyfile-plugin.h
-
-libnm_settings_plugin_keyfile_la_LIBADD = \
-	libkeyfile-io.la
-
-keyfiledir=$(sysconfdir)/NetworkManager/system-connections
-
-install-data-hook:
-	$(mkinstalldirs) -m 0755 $(DESTDIR)$(keyfiledir)
-
+SUBDIRS = tests

src/settings/plugins/keyfile/tests/Makefile.am

@@ -23,10 +23,7 @@ AM_CPPFLAGS = \
 noinst_PROGRAMS = test-keyfile
 
 test_keyfile_SOURCES = \
-	test-keyfile.c \
-	../nms-keyfile-reader.c \
-	../nms-keyfile-writer.c \
-	../nms-keyfile-utils.c
+	test-keyfile.c
 
 test_keyfile_LDADD = \
 	$(top_builddir)/src/libNetworkManager.la \