[ VM ] Remove options from standard dart --help output that are covered

by DartDev commands

Fixes #42483

Change-Id: I7ca88907c2588e6085f83a613ee41d99cb661c5d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/153902
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Ben Konyi <bkonyi@google.com>

runtime/bin/main_options.cc

@@ -190,17 +190,6 @@ void Options::PrintUsage() {
 "      --warn-on-pause-with-no-debugger\n"
 "  This set is subject to change.\n"
 "  Please see these options for further documentation.\n"
-"--write-service-info=<file_uri>\n"
-"  Outputs information necessary to connect to the VM service to the\n"
-"  specified file in JSON format. Useful for clients which are unable to\n"
-"  listen to stdout for the Observatory listening message.\n"
-"--snapshot-kind=<snapshot_kind>\n"
-"--snapshot=<file_name>\n"
-"  These snapshot options are used to generate a snapshot of the loaded\n"
-"  Dart script:\n"
-"    <snapshot-kind> controls the kind of snapshot, it could be\n"
-"                    kernel(default) or app-jit\n"
-"    <file_name> specifies the file into which the snapshot is written\n"
 "--version\n"
 "  Print the VM version.\n"
 "\n"