nvim: plugins: Drop cscope

Now that we have migrated to clang LSP for C, the only reason for
keeping it around was using it to find files in gst-build repository
which was structured in such a way that fzf and rg could not be used.
Now that GStreamer has moved to monorepo setup, we can use fzf and
rg just like in any project. No need for cscope anymore.

nvim/.config/nvim/after/ftplugin/c.vim

@@ -3,22 +3,6 @@ setlocal complete-=i
 setlocal path+=/usr/include/**
 setlocal makeprg=ninja\ -C\ build
 
-nnoremap <buffer> <LocalLeader>ct :AsyncDo ctags -R --fields=+nS --excmd=number .<CR>
-nnoremap <buffer> <LocalLeader>cu :AsyncDo cscope -bqR<CR>
-nnoremap <buffer> <LocalLeader>cr :cs reset<CR>
-
-nmap <buffer> <silent> <LocalLeader>s  <Plug>(quickr_cscope_symbols)
-nmap <buffer> <silent> <LocalLeader>g  <Plug>(quickr_cscope_global)
-nmap <buffer> <silent> <LocalLeader>h  <Plug>(quickr_cscope_global_split)
-nmap <buffer> <silent> <LocalLeader>v  <Plug>(quickr_cscope_global_vert_split)
-nmap <buffer> <silent> <LocalLeader>D  <Plug>(quickr_cscope_functions)
-nmap <buffer> <silent> <LocalLeader>c  <Plug>(quickr_cscope_callers)
-nmap <buffer> <silent> <LocalLeader>t  <Plug>(quickr_cscope_text)
-nmap <buffer> <silent> <LocalLeader>e  <Plug>(quickr_cscope_egrep)
-nmap <buffer> <silent> <LocalLeader>f  <Plug>(quickr_cscope_files)
-nmap <buffer> <silent> <LocalLeader>i  <Plug>(quickr_cscope_includes)
-nmap <buffer> <silent> <LocalLeader>a  <Plug>(quickr_cscope_assignments)
-
 " If we are working with any of the gstreamer projects in C, run gst-ident
 " before saving. Assume gst-ident from gstreamer/tools/gst-indent has been
 " made available in path.

nvim/.config/nvim/init.lua

@@ -77,8 +77,6 @@ vim.g.maplocalleader = ","
 vim.g.FerretMap                   = 0
 vim.g.FerretHlsearch              = 0
 vim.g.FerretAutojump              = 0
--- Needs to be set before loading quickr-cscope
-vim.g.quickr_cscope_keymaps       = 0
 -- Needs to be set before vimtex gets loaded, else it complains
 vim.g.tex_flavor                  = 'latex'
 vim.g.vimtex_view_general_viewer  = 'zathura'

nvim/.config/nvim/lua/plugins.lua

@@ -47,7 +47,6 @@ local init = function ()
   use 'hauleth/asyncdo.vim'
   -- Quickfix
   use 'yssl/QFEnter'
-  use 'ronakg/quickr-cscope.vim'
   use 'milkypostman/vim-togglelist'
   use 'chengzeyi/fzf-preview.vim'
   -- Text Object plugins