fix(nvim): purge lingering telescope back-references

Four plugin specs still listed telescope (or telescope-dap) as a
dependency, causing :Lazy sync to silently re-install telescope
after Phase 3. Drop the explicit telescope dep from venv-selector
(v2 has its own picker UI) and from dap (telescope-dap was unused).
Delete cheatsheet.nvim and gitignore.nvim entirely — both are
pure-telescope frontends with no fallback, and removing telescope
broke them.

lua/absolute/after/cheatsheet.lua

@@ -1,9 +0,0 @@
-local cheatsheet = require("cheatsheet")
-
-cheatsheet.setup({})
-
-
-local opts = { noremap = true, silent = true }
-
-opts.desc = "Show Cheatsheet"
-vim.keymap.set("n", "<leader>\\", "<cmd>Cheatsheet<CR>", opts) -- toggle file explorer

lua/absolute/after/gitignore.lua

@@ -1,18 +0,0 @@
-local gitignore = require("gitignore")
-local GetProjectRoot = require("absolute.utils.get-git-root")
-
--- Keymaps
-
-local opts = { noremap = true, silent = true }
-
-opts.desc = "GitIgnore: Generate .gitignore"
-
-vim.keymap.set("n", "<leader>gi", function()
-    local path = GetProjectRoot()
-
-    gitignore.generate(path)
-end, opts)
-
--- Global Settings
-
-vim.g.gitignore_nvim_overwrite = true