Remove vgen test to avoid Bit::Vector for testing.

ci/docker/buildenv/Dockerfile

@@ -40,7 +40,7 @@ RUN apt-get update \
 
 WORKDIR /tmp
 
-RUN cpan install -fi Unix::Processors Parallel::Forker Bit::Vector
+RUN cpan install -fi Unix::Processors Parallel::Forker
 
 RUN git clone https://github.com/veripool/vcddiff.git && \
     make -C vcddiff && \

ci/travis-install.bash

@@ -94,7 +94,6 @@ elif [ "$TRAVIS_BUILD_STAGE_NAME" = "test" ]; then
   if [ "$TRAVIS_DIST" != "trusty" ]; then
     TRAVIS_CPAN_REPO=https://cpan.org
   fi
-  # Not listing Bit::Vector as slow to install, and only skips one test
   yes yes | sudo cpan -M $TRAVIS_CPAN_REPO -fi Unix::Processors Parallel::Forker
   install-vcddiff
 else

docs/install.adoc

@@ -102,7 +102,6 @@ Those developing Verilator itself may also want these (see internals.adoc):
    cpan install Pod::Perldoc
    cpan install Unix::Processors
    cpan install Parallel::Forker
-   cpan install Bit::Vector
 
 ==== Install SystemC
 

docs/internals.adoc

@@ -628,8 +628,6 @@ https://github.com/veripool/vcddiff
 
 * Cmake for build paths that use it.
 
-* Bit::Vector to test vgen.pl
-
 === Controlling the Test Driver
 
 Test drivers are written in PERL. All invoke the main test driver script,

test_regress/t/t_vgen.pl

@@ -1,32 +0,0 @@
-#!/usr/bin/env perl
-if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
-# DESCRIPTION: Verilator: Verilog Test driver/expect definition
-#
-# Copyright 2003 by Wilson Snyder. This program is free software; you
-# can redistribute it and/or modify it under the terms of either the GNU
-# Lesser General Public License Version 3 or the Perl Artistic License
-# Version 2.0.
-# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
-
-scenarios(simulator => 1);
-
-if (eval "use Bit::Vector; return 2;" != 2) {
-    skip("Vgen test requires Bit::Vector");
-} else {
-
-    top_filename("$Self->{obj_dir}/vgen.v");
-
-    run(cmd => ["./vgen.pl",
-        "-o $Self->{top_filename}",
-        #"--seed 0",
-    ]);
-
-    compile(
-    );
-
-    execute(
-    check_finished => 1,
-    );
-}
-ok(1);
-1;