revert: "feat(extmarks): subpriorities (relative to declaration order) (#27131)" (#28585)

This reverts commit 15e77a56b711102fdc123e15b3f37d49bc0b1df1.

Subpriorities were added in https://github.com/neovim/neovim/pull/27131
as a mechanism for enforcing query order when using iter_matches in the
Tree-sitter highlighter. However, iter_matches proved to have too many
complications to use in the highlighter so we eventually reverted back
to using iter_captures (https://github.com/neovim/neovim/pull/27901).
Thus, subpriorities are no longer needed and can be removed.

1 files changed, 0 insertions, 41 deletions

diff --git a/test/functional/ui/decorations_spec.lua b/test/functional/ui/decorations_spec.lua
index ac879c33fc..244e37d9d9 100644
--- a/test/functional/ui/decorations_spec.lua
+++ b/test/functional/ui/decorations_spec.lua
@@ -727,47 +727,6 @@ describe('decorations providers', function()
     n.assert_alive()
   end)
 
-  it('supports subpriorities (order of definitions in a query file #27131)', function()
-    insert(mulholland)
-    setup_provider [[
-      local test_ns = api.nvim_create_namespace('mulholland')
-      function on_do(event, ...)
-        if event == "line" then
-          local win, buf, line = ...
-          api.nvim_buf_set_extmark(buf, test_ns, line, 0, {
-            end_row = line + 1,
-            hl_eol = true,
-            hl_group = 'Comment',
-            ephemeral = true,
-            priority = 100,
-            _subpriority = 20,
-          })
-
-          -- This extmark is set last but has a lower subpriority, so the first extmark "wins"
-          api.nvim_buf_set_extmark(buf, test_ns, line, 0, {
-            end_row = line + 1,
-            hl_eol = true,
-            hl_group = 'String',
-            ephemeral = true,
-            priority = 100,
-            _subpriority = 10,
-          })
-        end
-      end
-    ]]
-
-    screen:expect{grid=[[
-      {4:// just to see if there was an accident }|
-      {4:// on Mulholland Drive                  }|
-      {4:try_start();                            }|
-      {4:bufref_T save_buf;                      }|
-      {4:switch_buffer(&save_buf, buf);          }|
-      {4:posp = getmark(mark, false);            }|
-      {4:restore_buffer(&save_buf);^              }|
-                                              |
-    ]]}
-  end)
-
   it('is not invoked repeatedly in Visual mode with vim.schedule() #20235', function()
     exec_lua([[_G.cnt = 0]])
     setup_provider([[