nvim: Remove automatic full-text completion

Automatic completion from full-text search was draining battery and generally not too helpful.
Disabled (commented) for now, can be re-enabled more specifically.

nvim/.config/nvim/lua/plug/_lsp.lua

@@ -157,7 +157,7 @@ cmp.setup({
         { name = 'latex_symbols' },
         { name = 'spell',        keyword_length = 3 },
         { name = 'tmux' },
-        { name = 'rg',           keyword_length = 5 },
+        --{ name = 'rg',           keyword_length = 5 },
         { name = 'vCard' },
     },
     mapping = cmp.mapping.preset.insert({