Revert "lsp: fix regression in jump_to_location() (#14446)"

This reverts commit 993ca90c9b.

runtime/lua/vim/lsp/util.lua

@@ -944,9 +944,6 @@ function M.jump_to_location(location)
   local from = {from_bufnr, vim.fn.line('.'), vim.fn.col('.'), 0}
   local item = {tagname=vim.fn.expand('<cword>'), from=from}
 
-  -- Save position in jumplist
-  vim.cmd("mark '")
-
   --- Jump to new location (adjusting for UTF-16 encoding of characters)
   local bufnr = vim.uri_to_bufnr(uri)
   api.nvim_set_current_buf(bufnr)