Unregister Python 3.4, it expired today.

Mk/Uses/python.mk

@@ -244,7 +244,7 @@ _INCLUDE_USES_PYTHON_MK=	yes
 # What Python version and what Python interpreters are currently supported?
 # When adding a version, please keep the comment in
 # Mk/bsd.default-versions.mk in sync.
-_PYTHON_VERSIONS=		2.7 3.6 3.7 3.5 3.4	# preferred first
+_PYTHON_VERSIONS=		2.7 3.6 3.7 3.5 # preferred first
 _PYTHON_PORTBRANCH=		2.7		# ${_PYTHON_VERSIONS:[1]}
 _PYTHON_BASECMD=		${LOCALBASE}/bin/python
 _PYTHON_RELPORTDIR=		lang/python
@@ -307,7 +307,7 @@ WARNING+=	"PYTHON_DEFAULT must be a version present in PYTHON2_DEFAULT or PYTHON
 .if ${_PYTHON_ARGS} == "2"
 DEV_ERROR+=		"USES=python:2 is no longer supported, use USES=python:2.7"
 .elif ${_PYTHON_ARGS} == "3"
-DEV_ERROR+=		"USES=python:3 is no longer supported, use USES=python:3.4+ or an appropriate version range"
+DEV_ERROR+=		"USES=python:3 is no longer supported, use USES=python:3.5+ or an appropriate version range"
 .endif  # ${_PYTHON_ARGS} == "2"
 
 .if defined(PYTHON_VERSION)

Mk/bsd.default-versions.mk

@@ -80,11 +80,11 @@ PERL5_DEFAULT:=		${_PERL5_FROM_BIN:R}
 PGSQL_DEFAULT?=		9.5
 # Possible values: 5.6, 7.1, 7.2, 7.3
 PHP_DEFAULT?=		7.2
-# Possible values: 2.7, 3.4, 3.5, 3.6, 3.7
+# Possible values: 2.7, 3.5, 3.6, 3.7
 PYTHON_DEFAULT?=	2.7
 # Possible values: 2.7
 PYTHON2_DEFAULT?=	2.7
-# Possible values: 3.4, 3.5, 3.6, 3.7
+# Possible values: 3.5, 3.6, 3.7
 PYTHON3_DEFAULT?=	3.6
 # Possible values: 2.3, 2.4, 2.5
 RUBY_DEFAULT?=		2.4