Disable concealing for tex

vim/ftplugin/tex.vim

@@ -1,4 +1,8 @@
 let g:vimtex_imaps_leader='?'
-let g:vimtex_compiler_latexmk ={
-\   'backend' : 'jobs'
-\}
+if !has("nvim")
+    let g:vimtex_compiler_latexmk ={
+    \   'backend' : 'jobs'
+    \}
+endif
+
+set conceallevel=0