indents(lua): use (comment) @auto

queries/lua/indents.scm

@@ -37,6 +37,5 @@
 ] @branch
 
 (comment) @auto
-(comment) @ignore
 
 (string) @auto

tests/indent/lua/comment.lua

@@ -5,9 +5,3 @@
   another
   comment
 --]]
-
-  --[[
-    another
-    comment
-    a bit more indented
-  --]]

tests/indent/lua_spec.lua

@@ -11,9 +11,7 @@ local run = Runner:new(it, "tests/indent/lua", {
 describe("indent Lua:", function()
   describe("whole file:", function()
     run:whole_file(".", {
-      expected_failures = {
-        "./comment.lua",
-      },
+      expected_failures = {},
     })
   end)