python-packages: Clean up Makefiles

This removes:

* Python 3 variants (VARIANT:=python3)

* "for Python3" from package titles

* Package selection condition from package dependencies, e.g.
  +PACKAGE_python3-six:python3-light replaced with +python3-light

* "Default" package information sections, e.g.
  Package/python-six/Default removed and package details merged into
  Package/python3-six

* "(Variant for Python3)" from package descriptions

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

lang/python/python-botocore/Makefile

@@ -2,7 +2,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=botocore
 PKG_VERSION:=1.12.66
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PYPI_NAME:=$(PKG_NAME)
 PKG_HASH:=25c39ecc71356287cf79d66981ec77deca374e28043b19b2f818d48aa34272a1
@@ -14,30 +14,23 @@ include ../pypi.mk
 include $(INCLUDE_DIR)/package.mk
 include ../python3-package.mk
 
-define Package/python-botocore/Default
+define Package/python3-botocore
   SUBMENU:=Python
   SECTION:=lang
   CATEGORY:=Languages
   TITLE:=botocore
   URL:=https://github.com/boto/botocore
-endef
-
-define Package/python3-botocore
-$(call Package/python-botocore/Default)
-  DEPENDS:=+PACKAGE_python3-botocore:python3 \
-	+PACKAGE_python3-botocore:python3-urllib3 \
-	+PACKAGE_python3-botocore:python3-docutils \
-	+PACKAGE_python3-botocore:python3-dateutil \
-	+PACKAGE_python3-botocore:python3-jmespath \
-	+PACKAGE_python3-botocore:python3-requests
-  VARIANT:=python3
+  DEPENDS:=+python3 \
+	+python3-urllib3 \
+	+python3-docutils \
+	+python3-dateutil \
+	+python3-jmespath \
+	+python3-requests
 endef
 
 define Package/python3-botocore/description
 A low-level interface to a growing number of Amazon Web Services.
 The botocore package is the foundation for the AWS CLI as well as boto3.
-.
-(Variant for Python3)
 endef
 
 $(eval $(call Py3Package,python3-botocore))