Remove ignore list and fix many warnings

.luacheckrc

@@ -2,16 +2,6 @@ unused_args = false
 allow_defined_top = true
 max_line_length = 999
 
-ignore = {
-    "pos1", "pos2",
-    "extent1", "extent2",
-    "header", "count",
-
-    "err", "state",
-    "filename", "def",
-    "file", "name",
-}
-
 read_globals = {
     string = {fields = {"split", "trim"}},
     table = {fields = {"copy", "getn"}},