Resolve issues mentioned in PR review

test/functional/core/job_spec.lua

@@ -297,10 +297,6 @@ describe('jobs', function()
     eq({'notification', 'exit', {data, 0}}, next_msg())
   end)
 
-  it('can omit options', function()
-    ok(eval([[jobstart('echo ""')]]) > 0)
-  end)
-
   it('can omit data callbacks', function()
     nvim('command', 'unlet g:job_opts.on_stdout')
     nvim('command', 'let g:job_opts.user = 5')

test/functional/ex_cmds/cd_spec.lua

@@ -280,7 +280,6 @@ describe("getcwd()", function ()
 
   it("returns empty string if working directory does not exist", function()
     if helpers.iswin() then
-      pending('[Cannot delete working directory in Windows]')
       return
     end
     command("cd "..directories.global)

test/functional/ex_cmds/write_spec.lua

@@ -88,7 +88,6 @@ describe(':write', function()
     command('let $HOME=""')
     eq(funcs.fnamemodify('.', ':p:h'), funcs.fnamemodify('.', ':p:h:~'))
     -- Message from check_overwrite
-    -- FIXME: 'E13: File exists (add ! to override)' in Windows
     if not helpers.iswin() then
       eq(('\nE17: "'..funcs.fnamemodify('.', ':p:h')..'" is a directory'),
         redir_exec('write .'))