drop python2 from devel/arm-none-eabi/gdb

I can't see any reason why this needs Python2, especially since the Python
scripts in PLIST are commented out.

ok?

Index: Makefile
===================================================================
RCS file: /cvs/ports/devel/arm-none-eabi/gdb/Makefile,v
diff -u -p -u -r1.14 Makefile
--- Makefile 3 Dec 2024 01:12:22 -0000 1.14
+++ Makefile 24 May 2025 19:35:54 -0000
@@ -2,7 +2,7 @@ COMMENT= gdb for arm-none-eabi cross-dev

DISTNAME= gdb-7.12.1
EXTRACT_SUFX= .tar.xz
-REVISION= 0
+REVISION= 2

HOMEPAGE= https://www.gnu.org/software/gdb/

@@ -24,7 +24,6 @@ CONFIGURE_ARGS+= --enable-multilib \
--without-guile

MODULES= lang/python
-MODPY_VERSION = ${MODPY_DEFAULT_VERSION_2}

TEST_DEPENDS=devel/dejagnu