Remove unnecessary detach tests

Author: st0012

CONTRIBUTING.md

@@ -377,10 +377,6 @@ Sends request to rdbg to step back from current method.
 
 Sends request to rdbg to terminate the debuggee.
 
-- assert_reattach
-
-Passes if reattaching to rdbg is successful.
-
 - assert_hover_result(expected, expression)
 
 Passes if result of `expression` matches `expected`.

test/protocol/detach_test.rb

@@ -155,20 +155,6 @@ def req_terminate_debuggee
       close_reader
     end
 
-    def assert_reattach
-      case ENV['RUBY_DEBUG_TEST_UI']
-      when 'vscode'
-        req_disconnect
-        attach_to_dap_server
-        res = find_crt_dap_response
-        result_cmd = res.dig(:command)
-        assert_equal 'configurationDone', result_cmd
-      when 'chrome'
-        req_disconnect
-        attach_to_cdp_server
-      end
-    end
-
     def assert_locals_result expected, frame_idx: 0
       case ENV['RUBY_DEBUG_TEST_UI']
       when 'vscode'