add a test for FK w/ naming convention; update mypy thing

There seems to be some dependency for mypy stated in tox for
unclear reasons that no longer exists, remove it

References: sqlalchemy/alembic#1029 (reply in thread)
Change-Id: Ied1a578f99ece0875e5d964b4f47a7759c9b2267

tests/test_autogen_render.py

@@ -2448,6 +2448,18 @@ def test_inline_fk(self):
             "name=op.f('fk_ct_t_c_q')))",
         )
 
+    def test_added_fk(self):
+        t = Table("t", self.metadata, Column("c", Integer, ForeignKey("q.id")))
+
+        fk = list(t.foreign_key_constraints)[0]
+        eq_ignore_whitespace(
+            autogenerate.render._render_foreign_key(
+                fk, self.autogen_context, self.metadata
+            ),
+            "sa.ForeignKeyConstraint(['c'], ['q.id'], "
+            "name=op.f('fk_ct_t_c_q'))",
+        )
+
     def test_render_check_constraint_renamed(self):
         """test that constraints from autogenerate render with
         the naming convention name explicitly.  These names should

tox.ini

@@ -75,7 +75,6 @@ deps=
     mypy
     sqlalchemy>=2
     mako
-    types-pkg-resources
     # is imported in alembic/testing and mypy complains if it's not installed.
     pytest
 commands = mypy ./alembic/ --exclude alembic/templates