simplify test_depends

Author: Tom Augspurger

.travis.yml

@@ -73,7 +73,7 @@ before_install:
     - BUILD_DEPENDS="$NP_BUILD_DEP Cython"
       # binary-only for cryptogrpahy. See https://github.com/pandas-dev/pandas/issues/26589
       # Moto picks it up, and they don't distribute 32-bit wheels.
-    - TEST_DEPENDS="$NP_TEST_DEP pytest>=4.0.2 pytest-xdist pytest-mock moto hypothesis>=3.58 wheel==0.31.1 cryptography --only-binary=cryptography"
+    - TEST_DEPENDS="$NP_TEST_DEP pytest>=4.0.2 pytest-xdist hypothesis"
     - source multibuild/common_utils.sh
     - source multibuild/travis_steps.sh
     - before_install