python3: merge python3-email into python3-urllib

As we're seeing in various test.sh scrip runs, importing 'email' fails
with not finding 'urllib' and vice-versa.

Then via a7e96ec91 ("python3-email: add python3-urllib as dependency")
I created a circular dependency.
So, might as well merge the two packages into one (named python3-urllib)
and updates all dependencies to pull python3-urllib.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

lang/python/python-babel/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=python-babel
 PKG_VERSION:=2.17.0
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PYPI_NAME:=babel
 PKG_HASH:=0c54cffb19f690cdcc52a3b50bcbf71e07a808d1c80d549f2459b9d2cf0afb9d
@@ -40,7 +40,7 @@ define Package/python3-babel
   URL:=https://babel.pocoo.org/
   DEPENDS:= \
     +python3-decimal \
-    +python3-email \
+    +python3-urllib \
     +python3-light \
     +python3-logging \
     +python3-urllib