Remove hint stripping on python 2 build and test (code now 100% compatible)

6 jobs for develop in 57 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #87391614
build:py2

00:00:27

passed #87391615
build:py3

00:00:56

failed #87391616
test:py2

00:00:28

passed #87391617
test:py3

00:00:45

 
  Dist
skipped #87391618
dist-test
skipped #87391619
pages
 
Name Stage Failure
failed
test:py2 Build
    def cb(resolve: Callable, reject: Callable):
^
SyntaxError: invalid syntax

----------------------------------------------------------------------
Ran 1 test in 0.001s

FAILED (errors=1)
ERROR: Job failed: exit code 1