chore: remove tabnine and its blink.cmp customizations

- Tabnine team officially declared tabnine-nvim is no longer
  officially supported (codota/tabnine-nvim#211, merged
  2026-05-04), so drop the community import and the blink.compat
  provider / fuzzy-sort priority that surfaced it in the menu.
- Revert the blink.cmp menu draw override to default; the
  source_name column was originally there to distinguish tabnine
  entries from LSP / snippets / buffer, and the default columns are
  sufficient without that need.

Author: jackblackevo

lua/community.lua

@@ -24,6 +24,5 @@ return {
   { import = "astrocommunity.diagnostics.trouble-nvim" },
   { import = "astrocommunity.lsp.actions-preview-nvim" },
   { import = "astrocommunity.lsp.lsp-signature-nvim" },
-  { import = "astrocommunity.completion.tabnine-nvim" },
   { import = "astrocommunity.ai.avante-nvim" },
 }