www/firefox: switch to system icu again

now that 2025Q1 is gone, we don't have to use the bundled icu
anymore

Author: moench-tegeder

www/firefox/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	firefox
 DISTVERSION=	137.0
-PORTREVISION=	1
+PORTREVISION=	2
 PORTEPOCH=	2
 CATEGORIES=	www wayland
 MASTER_SITES=	MOZILLA/${PORTNAME}/releases/${DISTVERSION}${DISTVERSIONSUFFIX}/source \
@@ -13,6 +13,7 @@ WWW=		https://www.mozilla.com/firefox
 
 BUILD_DEPENDS=	nspr>=4.32:devel/nspr \
 		nss>=3.109:security/nss \
+		icu>=76.1:devel/icu \
 		libevent>=2.1.8:devel/libevent \
 		harfbuzz>=10.1.0:print/harfbuzz \
 		graphite2>=1.3.14:graphics/graphite2 \
@@ -31,8 +32,7 @@ BUILD_DEPENDS=	nspr>=4.32:devel/nspr \
 
 USE_GECKO=	gecko
 CONFLICTS_INSTALL=	firefox-esr
-# we have to use the builtin icu as devel/icu is too old on 2025Q1
-USE_MOZILLA=	-icu -sqlite
+USE_MOZILLA=	-sqlite
 # work around bindgen not finding ICU, e.g.
 # dist/include/mozilla/intl/ICU4CGlue.h:8:10: fatal error: 'unicode/uenum.h' file not found, err: true
 CONFIGURE_ENV+=	BINDGEN_CFLAGS="-I${LOCALBASE}/include"