וְהִכְרַתִּ֖י עָרֵ֣י אַרְצֶ֑ךָ וְהָרַסְתִּ֖י כָּל־מִבְצָרֶֽיךָ׃
И Я отрежу города земли твоей, И скину все твердыни твои;
Tze'enah Ure'enah
“I will destroy the cities of your land and demolish all your fortresses” [5:10]. There will be such great peace after the war of Gog and Magog and Israel will not need to build strong cities with walls. Their open cities will be secure without walls.3Radak, Micah, 5:10.
Rashi
And I will destroy your cities—And you will no longer need fortified cities.