test: remove a few more redundant clear() calls (#35903)

test/functional/api/buffer_updates_spec.lua

@@ -57,7 +57,6 @@ local function editoriginal(activate, lines)
     lines = origlines
   end
   -- load up the file with the correct contents
-  clear()
   return open(activate, lines)
 end
 
@@ -507,8 +506,6 @@ describe('API: buffer events:', function()
   end)
 
   it('can notify several channels at once', function()
-    clear()
-
     -- create several new sessions, in addition to our main API
     local sessions = {}
     local pipe = n.new_pipename()
@@ -781,8 +778,6 @@ describe('API: buffer events:', function()
   end)
 
   it('detaches if the buffer is unloaded/deleted/wiped', function()
-    -- start with a blank nvim
-    clear()
     -- need to make a new window with a buffer because :bunload doesn't let you
     -- unload the last buffer
     for _, cmd in ipairs({ 'bunload', 'bdelete', 'bwipeout' }) do
@@ -798,20 +793,17 @@ describe('API: buffer events:', function()
   end)
 
   it('does not send the buffer content if not requested', function()
-    clear()
     local b, tick = editoriginal(false)
     ok(api.nvim_buf_attach(b, false, {}))
     expectn('nvim_buf_changedtick_event', { b, tick })
   end)
 
   it('returns a proper error on nonempty options dict', function()
-    clear()
     local b = editoriginal(false)
     eq("Invalid key: 'builtin'", pcall_err(api.nvim_buf_attach, b, false, { builtin = 'asfd' }))
   end)
 
   it('nvim_buf_attach returns response after delay #8634', function()
-    clear()
     sleep(250)
     -- response
     eq(true, n.request('nvim_buf_attach', 0, false, {}))