don't call terminal api on windows

Author: chrisbra

src/testdir/test_terminal2.vim

@@ -290,16 +290,16 @@ func Test_termwinscroll_topline()
 endfunc
 
 func Test_termwinscroll_topline2()
+  " calling the terminal API doesn't work on Windows
+  CheckNotMSWindows
   let g:test_is_flaky = 1
   let g:print_complete = 0
   func! Tapi_print_complete(bufnum, arglist)
     let g:print_complete = 1
   endfunc
 
   set termwinscroll=50000 mouse=a
-  if !has('win32')
-    set shell=sh
-  endif
+  set shell=sh
   let norm_winid = win_getid()
   terminal
   call assert_equal(2, winnr('$'))
@@ -309,11 +309,7 @@ func Test_termwinscroll_topline2()
 
   let num1 = &termwinscroll / 1000 * 999
   call writefile(range(num1), 'Xtext', 'D')
-  if has('win32')
-    call term_sendkeys(buf, "type Xtext\<CR>")
-  else
-    call term_sendkeys(buf, "cat Xtext\<CR>")
-  endif
+  call term_sendkeys(buf, "cat Xtext\<CR>")
   call term_sendkeys(buf, 'printf ''\033]51;["call", "Tapi_print_complete", []]\007''' .. "\<cr>")
   let rows = term_getsize(buf)[0]
   let cnt = 0
@@ -332,11 +328,7 @@ func Test_termwinscroll_topline2()
 
   let num2 = &termwinscroll / 1000 * 8
   call writefile(range(num2), 'Xtext', 'D')
-  if has('win32')
-    call term_sendkeys(buf, "timeout /t 2 && type Xtext\<CR>")
-  else
-    call term_sendkeys(buf, "sleep 2; cat Xtext\<CR>")
-  endif
+  call term_sendkeys(buf, "sleep 2; cat Xtext\<CR>")
   let winrow = get(get(filter(getwininfo(), 'v:val.winid == norm_winid'), 0, {}), 'winrow', -1)
 
   call test_setmouse(winrow, 1)