build: remove autotools build system

Now that we are post-3.26, we are removing the legacy autotools
build system in favor of meson.

Please report any errors you have so that we can ensure this is
ready for GNOME 3.28.

src/Makefile.am

@@ -1,49 +0,0 @@
-if ENABLE_GTK
-
-bin_PROGRAMS = sysprof
-
-sysprof_CFLAGS = \
-	$(GIO_CFLAGS) \
-	$(GTK_CFLAGS) \
-	$(POLKIT_CFLAGS) \
-	-I$(top_srcdir)/lib \
-	-I$(top_builddir)/lib
-
-sysprof_SOURCES = \
-	sysprof.c \
-	sp-application.c \
-	sp-application.h \
-	sp-credits.h \
-	sp-window.c \
-	sp-window.h \
-	sp-window-settings.c \
-	sp-window-settings.h \
-	$(NULL)
-
-nodist_sysprof_SOURCES = \
-	sp-resources.c \
-	sp-resources.h
-
-sysprof_LDADD = \
-	$(GIO_LIBS) \
-	$(GTK_LIBS) \
-	$(LIBM) \
-	$(POLKIT_LIBS) \
-	$(top_builddir)/lib/libsysprof-@API_VERSION@.la \
-	$(top_builddir)/lib/libsysprof-ui-@API_VERSION@.la \
-	$(NULL)
-
-EXTRA_DIST = meson.build
-CLEANFILES =
-DISTCLEANFILES =
-BUILT_SOURCES =
-
-glib_resources_xml = resources/sysprof.gresource.xml
-glib_resources_c = sp-resources.c
-glib_resources_h = sp-resources.h
-glib_resources_namespace = sysprof
-include $(top_srcdir)/gresources.mk
-
-endif
-
--include $(top_srcdir)/git.mk