www/firefox-esr: remove in preparation for update

$ svn ci
Sending Mk/Uses/gecko.mk
Replacing www/firefox-esr
Sending www/firefox-esr/Makefile
Deleting www/firefox-esr/Makefile.options
Sending www/firefox-esr/distinfo
Deleting www/firefox-esr/files/patch-bug1435212
Sending www/firefox-esr/files/patch-z-bug1436911
Deleting www/firefox-esr/files/pkg-deinstall.in
Deleting www/firefox-esr/files/pkg-install.in
Replacing www/firefox-esr-i18n
Sending www/firefox-esr-i18n/Makefile
Sending www/firefox-esr-i18n/distinfo
Transmitting file data ......done
Committing transaction...
svn: E165001: Commit failed (details follow):
svn: E165001: Commit blocked by pre-commit hook (exit code 1) with output:
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr"

Additional errors may compound and may not be accurate

Do not replace a file. This can lose history. Path: "/head/www/firefox-esr-i18n"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr-i18n"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr-i18n"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr-i18n"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr-i18n"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr"
Do not replace a file. This can lose history. Path: "/head/www/firefox-esr-i18n"

Pre-commit problem count: 12

svn: E165001: Your commit message was left in a temporary file:
svn: E165001: '/path/to/head/svn-commit.tmp'