Revert "chore(nvim): add hologram plugin"

This reverts commit 4e966190c9.

nvim/after/plugin/hologram.lua

@@ -1,9 +0,0 @@
--- Hologram – https://github.com/edluffy/hologram.nvim
-local status, hologram = pcall(require, "hologram")
-if not status then
-	return
-end
-
-hologram.setup({
-	auto_display = true,
-})

nvim/lua/kogakure/plugins.lua

@@ -152,7 +152,6 @@ return packer.startup(function(use)
 	use("rhysd/vim-grammarous") -- A powerful grammar checker for Vim using LanguageTool
 	use("mechatroner/rainbow_csv") -- Rainbow CSV
 	use("dbeniamine/cheat.sh-vim") -- Cheat.sh
-	use("edluffy/hologram.nvim") -- Terminal image viewer
 
 	-- Custom Text Objects
 	use("christoomey/vim-titlecase")