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/pyodbc/Makefile

@@ -6,7 +6,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=pyodbc
 PKG_VERSION:=4.0.26
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PYPI_NAME:=$(PKG_NAME)
 PKG_HASH:=e52700b5d24a846483b5ab80acd9153f8e593999c9184ffea11596288fb33de3
@@ -22,19 +22,13 @@ include $(INCLUDE_DIR)/uclibc++.mk
 include $(INCLUDE_DIR)/package.mk
 include ../python3-package.mk
 
-define Package/python-pyodbc/Default
+define Package/python3-pyodbc
   SECTION:=lang
   CATEGORY:=Languages
   SUBMENU:=Python
-  URL:=https://github.com/mkleehammer/pyodbc
-  DEPENDS:=+unixodbc $(CXX_DEPENDS)
-endef
-
-define Package/python3-pyodbc
-$(call Package/python-pyodbc/Default)
   TITLE:=python3-pyodbc
-  DEPENDS+=+PACKAGE_python3-pyodbc:python3-light
-  VARIANT:=python3
+  URL:=https://github.com/mkleehammer/pyodbc
+  DEPENDS:=+unixodbc +python3-light $(CXX_DEPENDS)
 endef
 
 define Package/python3-pyodbc/description
@@ -42,8 +36,6 @@ DB API Module for ODBC
 
 A Python DB API 2 module for ODBC. This project provides an up-to-date,
 convenient interface to ODBC using native data types like datetime and decimal.
-
-(Variant for Python3)
 endef
 
 $(eval $(call Py3Package,python3-pyodbc))