remove: drop Wayland frontend

tests/Makefile

@@ -7,11 +7,11 @@ LIBS = -lthread -lbio $(FT_LIBS)
 
 PROG = unit_test
 TESTSRC = unit_test.c test_util.c str_test.c hash_test.c trie_test.c \
-	ko_test.c vi_test.c engine_test.c dict_test.c ipc_test.c wayland_test.c \
+	ko_test.c vi_test.c engine_test.c dict_test.c ipc_test.c \
 	popup_test.c font_test.c
 TESTOBJ = $(TESTSRC:.c=.o)
-PARENTSRC = str.c hash.c trie.c dict.c ko.c vi.c ipc.c wayland_state.c \
-	popup_layout.c font.c
+PARENTSRC = str.c hash.c trie.c dict.c ko.c vi.c ipc.c popup_layout.c \
+	font.c
 PARENTOBJ = $(PARENTSRC:%.c=unit_%.o)
 OBJS = $(TESTOBJ) $(PARENTOBJ)