Remove current year from messages.pot

This is pybabel boilerplate and bumping it each year is not
actually how copyright works (c.f. <https://hynek.me/til/copyright-years/>),
so let's just remove it entirely. No other file has a similar
automated requirement it be updated after the new year.

Author: legoktm

Makefile

@@ -335,6 +335,7 @@ $(POT): securedrop
 		--project="SecureDrop" \
 		--msgid-bugs-address=securedrop@freedom.press \
 		--copyright-holder="Freedom of the Press Foundation" \
+		--header-comment=$$'# Translations template for PROJECT.\n# This file is distributed under the same license as the PROJECT project.\n#' \
 		--add-comments="Translators:" \
 		--strip-comments \
 		--add-location=never \
@@ -363,6 +364,7 @@ $(DESKTOP_POT): ${DESKTOP_BASE}/*.in
 		--project=SecureDrop \
 		--msgid-bugs-address=securedrop@freedom.press \
 		--copyright-holder="Freedom of the Press Foundation" \
+		--header-comment=$$'# Translations template for PROJECT.\n# This file is distributed under the same license as the PROJECT project.\n#' \
 		--add-location=never \
 		--sort-output \
 		$^

install_files/ansible-base/roles/tails-config/templates/locale/messages.pot

@@ -1,7 +1,5 @@
 # Translations template for SecureDrop.
-# Copyright (C) 2025 Freedom of the Press Foundation
 # This file is distributed under the same license as the SecureDrop project.
-# FIRST AUTHOR <EMAIL@ADDRESS>, 2025.
 #
 #, fuzzy
 msgid ""

securedrop/translations/messages.pot

@@ -1,7 +1,5 @@
 # Translations template for SecureDrop.
-# Copyright (C) 2025 Freedom of the Press Foundation
 # This file is distributed under the same license as the SecureDrop project.
-# FIRST AUTHOR <EMAIL@ADDRESS>, 2025.
 #
 #, fuzzy
 msgid ""