lib: remove _debugger.js

The file no longer works after the removal of the --debug/--debug-brk
switches in commit 47f8f74 ("src: remove support for --debug".)

This commit also removes several tests that still referenced the
old debugger but were either unit-testing its internals or passing
for the wrong reason (like expecting an operation to fail, which
it did because the debugger is gone.)

PR-URL: https://github.com/nodejs/node/pull/12495
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/node.gyp b/node.gyp
index db0531c0694..8b1bb0c71fe 100644
--- a/node.gyp
+++ b/node.gyp
@@ -23,7 +23,6 @@
     'library_files': [
       'lib/internal/bootstrap_node.js',
       'lib/_debug_agent.js',
-      'lib/_debugger.js',
       'lib/assert.js',
       'lib/buffer.js',
       'lib/child_process.js',