Updated harpoon config

- Included a function that removes files from harpoon buffers

based on the following issue:
ThePrimeagen/harpoon#499

nvim/lua/plugins/harpoon.lua

@@ -7,17 +7,31 @@ return {
     harpoon.setup({})
     local conf = require("telescope.config").values
     local function toggle_telescope(harpoon_files)
-      local file_paths = {}
-      for _,item in ipairs(harpoon_files.items)do
-           table.insert(file_paths,item.value)
+      local finder = function()
+        local file_paths = {}
+        for _,item in ipairs(harpoon_files.items)do
+             table.insert(file_paths,item.value)
+        end
+      return require("telescope.finders").new_table({
+        results = file_paths,
+      })
       end
-      require("telescope.pickers").new({}, {
+
+        require("telescope.pickers").new({}, {
         prompt_title = "Harpoon",
-        finder = require("telescope.finders").new_table({
-          results = file_paths,
-        }),
+        finder = finder(),
         previewer = conf.file_previewer({}),
         sorter = conf.generic_sorter({}),
+        attach_mappings = function(prompt_bufnr, map)
+          map("i", "<C-d>", function ()
+            local state = require("telescope.actions.state")
+            local selected_entry = state.get_selected_entry()
+            local current_picker = state.get_current_picker(prompt_bufnr)
+            table.remove(harpoon_files.items, selected_entry.index)
+            current_picker:refresh(finder())
+          end)
+        return true
+        end,
       }):find()
     end
     vim.keymap.set("n", "<leader>a", function() harpoon:list():add() end)