Update from 1.6.2 -> 1.6.9 introduced dozens of unused ENV variables

[demetrios]

$ env before the upgrade:

PATH…
...
rvm_path=/Users/mbd/.rvm
rvm_prefix=/Users/mbd
rvm_bin_path=/Users/mbd/.rvm/bin
_system_type=Darwin
_system_name=OSX
_system_version=10.10
_system_arch=x86_64
rvm_version=1.26.2 (master)
GEM_HOME=/Users/mbd/.rvm/gems/ruby-2.1.4@myapp
GEM_PATH=/Users/mbd/.rvm/gems/ruby-2.1.4@myapp:/Users/mbd/.rvm/gems/ruby-2.1.4@global
MY_RUBY_HOME=/Users/mbd/.rvm/rubies/ruby-2.1.4
IRBRC=/Users/mbd/.rvm/rubies/ruby-2.1.4/.irbrc
RUBY_VERSION=ruby-2.1.4
rvm_alias_expanded=
rvm_bin_flag=
rvm_docs_type=
rvm_gemstone_package_file=
rvm_gemstone_url=
rvm_niceness=
rvm_nightly_flag=
rvm_only_path_flag=
rvm_proxy=
rvm_quiet_flag=
rvm_ruby_bits=
rvm_ruby_file=
rvm_ruby_make=
rvm_ruby_make_install=
rvm_ruby_mode=
rvm_script_name=
rvm_sdk=
rvm_silent_flag=
rvm_use_flag=
rvm_wrapper_name=
rvm_delete_flag=0
rvm_file_name=
rvm_ruby_alias=
rvm_sticky_flag=
rvm_system_flag=
rvm_user_flag=
rvm_ruby_string=ruby-2.1.4
_=/usr/bin/env

$ rvm get stable (update to RVM 1.6.9 in separate shell)
$ rvm reload
$ env

PATH…
...
rvm_path=/Users/mbd/.rvm
rvm_prefix=/Users/mbd
rvm_bin_path=/Users/mbd/.rvm/bin
rvm_version=1.26.9 (master)
GEM_HOME=/Users/mbd/.rvm/gems/ruby-2.1.4@myapp
GEM_PATH=/Users/mbd/.rvm/gems/ruby-2.1.4@myapp:/Users/mbd/.rvm/gems/ruby-2.1.4@global
MY_RUBY_HOME=/Users/mbd/.rvm/rubies/ruby-2.1.4
IRBRC=/Users/mbd/.rvm/rubies/ruby-2.1.4/.irbrc
RUBY_VERSION=ruby-2.1.4
rvm_alias_expanded=
rvm_bin_flag=
rvm_docs_type=
rvm_gemstone_package_file=
rvm_gemstone_url=
rvm_niceness=
rvm_nightly_flag=
rvm_only_path_flag=
rvm_proxy=
rvm_quiet_flag=
rvm_ruby_bits=
rvm_ruby_file=
rvm_ruby_make=
rvm_ruby_make_install=
rvm_ruby_mode=
rvm_script_name=
rvm_sdk=
rvm_silent_flag=
rvm_use_flag=
rvm_wrapper_name=
rvm_stored_umask=022
rvm_pretty_print_flag=1
rvm_project_rvmrc=1
__array_start=1
__rvm_env_loaded=1
rvm_user_install_flag=1
rvm_archives_path=/Users/mbd/.rvm/archives
rvm_debug_flag=0
rvm_docs_path=/Users/mbd/.rvm/docs
rvm_environments_path=/Users/mbd/.rvm/environments
rvm_examples_path=/Users/mbd/.rvm/examples
rvm_gemsets_path=/Users/mbd/.rvm/gemsets
rvm_help_path=/Users/mbd/.rvm/help
rvm_hooks_path=/Users/mbd/.rvm/hooks
rvm_lib_path=/Users/mbd/.rvm/lib
rvm_log_path=/Users/mbd/.rvm/log
rvm_patches_path=/Users/mbd/.rvm/patches
rvm_repos_path=/Users/mbd/.rvm/repos
rvm_rubies_path=/Users/mbd/.rvm/rubies
rvm_scripts_path=/Users/mbd/.rvm/scripts
rvm_src_path=/Users/mbd/.rvm/src
rvm_tmp_path=/Users/mbd/.rvm/tmp
rvm_user_path=/Users/mbd/.rvm/user
rvm_usr_path=/Users/mbd/.rvm/usr
rvm_verbose_flag=0
rvm_wrappers_path=/Users/mbd/.rvm/wrappers
rvm_man_path=/Users/mbd/.rvm/share/man
rvm_head_flag=
rvm_ruby_selected_flag=
rvm_default_flag=
rvm_loaded_flag=1
rvm_llvm_flag=
rvm_dump_environment_flag=
rvm_trace_flag=
rvm_remove_flag=
rvm_gemdir_flag=
rvm_install_on_use_flag=
rvm_remote_flag=
rvm_ruby_gem_path=
rvm_ruby_strings=
rvm_ruby_binary=
rvm_ruby_gem_home=
rvm_ruby_home=
rvm_ruby_interpreter=
rvm_ruby_irbrc=
rvm_ruby_major_version=
rvm_ruby_minor_version=
rvm_ruby_package_name=
rvm_ruby_patch_level=
rvm_ruby_release_version=
rvm_ruby_repo_url=
rvm_ruby_repo_branch=
rvm_ruby_revision=
rvm_ruby_tag=
rvm_ruby_sha=
rvm_ruby_version=
rvm_ruby_package_file=
rvm_ruby_name=
rvm_ruby_args=
rvm_ruby_user_tag=
rvm_ruby_patch=
rvm_error_message=
rvm_gemset_name=
rvm_parse_break=0
rvm_token=reload
rvm_action=reload
rvm_expanding_aliases=
rvm_patch_original_pwd=
rvm_archive_extension=
rvm_error_clr=
rvm_warn_clr=
rvm_debug_clr=
rvm_notify_clr=
rvm_reset_clr=
rvm_zsh_clobber=1
rvm_zsh_nomatch=0
next_token=
rvm_ruby_string=
_system_type=Darwin
_system_name=OSX
_system_version=10.10
_system_arch=x86_64
rvm_path_flag=
rvm_cron_flag=
rvm_static_flag=
rvm_skip_autoreconf_flag=
rvm_dynamic_extensions_flag=
rvm_18_flag=
rvm_19_flag=
rvm_20_flag=
rvm_21_flag=
rvm_force_autoconf_flag=
rvm_curl_flags=
rvm_rubygems_version=
rvm_skip_pristine_flag=
rvm_create_flag=
rvm_movable_flag=
rvm_archive_flag=
rvm_auto_reload_flag=
rvm_disable_binary_flag=
rvm_ignore_gemsets_flag=
rvm_skip_gemsets_flag=
rvm_verify_downloads_flag=
rvm_skip_openssl_flag=
rvm_ruby_log_path=
rvm_stored_errexit=
detected_rvm_ruby_name=
rvm_export_args=
rvm_tar_command=
rvm_tar_options=
rvm_autoinstall_bundler_flag=
rvm_codesign_identity=
rvm_expected_gemset_name=
rvm_without_gems=
rvm_with_gems=
rvm_with_default_gems=
rvm_ignore_dotfiles_flag=
rvm_fuzzy_flag=
rvm_autolibs_flag=
rvm_autolibs_flag_number=
rvm_autolibs_flag_runner=
rvm_quiet_curl_flag=
rvm_max_time_flag=
rvm_error_color=
rvm_warn_color=
rvm_debug_color=
rvm_notify_color=
rvm_reset_color=
rvm_log_timestamp=
rvm_log_filesystem=
rvm_log_namelen=
rvm_show_log_lines_on_error=
_=/usr/bin/env