remove aenum from show versions; cleanup getting source crs for transform group (#398)

Author: snowman2

pyproj/_show_versions.py

@@ -53,7 +53,7 @@ def _get_deps_info():
     deps_info: dict
         version information on relevant Python libraries
     """
-    deps = ["pyproj", "pip", "setuptools", "Cython", "aenum"]
+    deps = ["pyproj", "pip", "setuptools", "Cython"]
 
     def get_version(module):
         try:

pyproj/_transformer.pyx

@@ -151,10 +151,8 @@ cdef _CRS get_transform_crs(_CRS in_crs):
             sub_crs._type != PJ_TYPE_TEMPORAL_CRS and
             sub_crs._type != PJ_TYPE_VERTICAL_CRS
         ):
-            return sub_crs
-    if in_crs.is_bound:
-        return in_crs.source_crs
-    return in_crs
+            return sub_crs.source_crs if sub_crs.is_bound else sub_crs
+    return in_crs.source_crs if in_crs.is_bound else in_crs
 
 
 cdef class _Transformer(Base):

test/test_show_versions.py

@@ -16,7 +16,6 @@ def test_get_deps_info():
     assert "setuptools" in deps_info
     assert "pyproj" in deps_info
     assert "Cython" in deps_info
-    assert "aenum" in deps_info
 
 
 def test_show_versions_with_proj(capsys):