nvim: Drop git messenger

git messenger does not size it's floating window correctly and cursor
gets all messed up while trying to jump in the floating window with
golden-ratio mode being active. May be related to the issue
https://github.com/rhysd/git-messenger.vim/issues/38

Based on the below issue
https://github.com/tpope/vim-fugitive/issues/1387

We can already use fugitive's git blame interface for seeing the last
commit on the line.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>

nvim/.config/nvim/after/plugin/fugitive.vim

@@ -15,3 +15,4 @@ nnoremap <Leader>g- :Git stash<CR>:e<CR>
 nnoremap <Leader>g+ :Git stash pop<CR>:e<CR>
 nnoremap <Leader>gw :Gwrite<CR>
 nnoremap <Leader>gG :Git<SPACE>
+nnoremap <Leader>gm :0,3Git blame<CR>

nvim/.config/nvim/init.vim

@@ -19,7 +19,6 @@ Plug 'wellle/tmux-complete.vim'
 " Git support
 Plug 'tpope/vim-fugitive'
 Plug 'airblade/vim-gitgutter'
-Plug 'rhysd/git-messenger.vim', { 'on': 'GitMessenger' }
 Plug 'rhysd/conflict-marker.vim'
 Plug 'whiteinge/diffconflicts'
 Plug 'salcode/vim-interactive-rebase-reverse'

nvim/.config/nvim/keymappings.vim

@@ -52,7 +52,6 @@ nnoremap ]t :tabnext<CR>
 nnoremap [T :tabfirst<CR>
 nnoremap ]T :tablast<CR>
 " For git
-nnoremap <Leader>gm :GitMessenger<CR>
 nnoremap ]c :GitGutterNextHunk<CR>
 nnoremap [c :GitGutterPrevHunk<CR>
 nnoremap ghs :GitGutterStageHunk<CR>