nvim: plugins: Drop nvim-gdb

termdebug seems good enough so just drop this. Or we will use nvim-dap
if needed. However, termdebug should be enough really. We also just
found gdb-dashboard which seems great adding just the necessary UI bits.

nvim/.config/nvim/after/ftplugin/nvimgdb.vim

@@ -1,2 +0,0 @@
-" Always open gdb debug window at the bottom
-wincmd J

nvim/.config/nvim/after/plugin/nvimgdb.vim

@@ -1,37 +0,0 @@
-let g:nvimgdb_disable_start_keymaps = 1
-
-function! NvimGdbNoTKeymaps()
-  tnoremap <silent> <buffer> jk <C-\><C-n>
-endfunction
-
-" Disable all default nvim-gdb keymaps
-let g:nvimgdb_config_override = {
-  \ 'key_next'       : v:null,
-  \ 'key_step'       : v:null,
-  \ 'key_finish'     : v:null,
-  \ 'key_continue'   : v:null,
-  \ 'key_until'      : v:null,
-  \ 'key_breakpoint' : v:null,
-  \ 'key_frameup'    : v:null,
-  \ 'key_framedown'  : v:null,
-  \ 'key_quit'       : v:null,
-  \ 'set_tkeymaps'   : "NvimGdbNoTKeymaps",
-  \ }
-
-nnoremap <Leader>dg :GdbStart gdb<SPACE>
-
-nnoremap <Leader>db :GdbBreakpointToggle<CR>
-nnoremap <Leader>dB :GdbBreakpointClearAll<CR>
-
-nnoremap <Leader>dc :GdbContinue<CR>
-nnoremap <Leader>dn :GdbNext<CR>
-nnoremap <Leader>ds :GdbStep<CR>
-nnoremap <Leader>dl :GdbUntil<SPACE>
-
-nnoremap <Leader>df :GdbFrame<CR>
-nnoremap <Leader>du :GdbFrameUp<CR>
-nnoremap <Leader>dd :GdbFrameDown<CR>
-
-nnoremap <Leader>dF :GdbFinish<CR>
-nnoremap <Leader>di :GdbInterrupt<CR>
-nnoremap <Leader>dq :GdbDebugStop<CR>

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

@@ -124,8 +124,6 @@ local init = function ()
     'rafamadriz/friendly-snippets',
     rtp = '.'
   }
-  -- GDB support
-  use 'sakhnik/nvim-gdb'
   -- For files with ANSI escape sequences
   use {
     'powerman/vim-plugin-AnsiEsc',