Revert "add coordinates_space.py (gwastro#4289)"

This reverts commit e3418c7.

pycbc/coordinates/base.py → pycbc/coordinates.py

@@ -14,18 +14,7 @@
 # You should have received a copy of the GNU General Public License along
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-
-
-#
-# =============================================================================
-#
-#                                   Preamble
-#
-# =============================================================================
-#
-"""
-Base coordinate transformations, this module provides transformations between
-cartesian and spherical coordinates.
+""" Coordinate transformations.
 """
 import numpy
 
@@ -71,7 +60,6 @@ def cartesian_to_spherical_azimuthal(x, y):
     phi = numpy.arctan2(y, x)
     return phi % (2 * numpy.pi)
 
-
 def cartesian_to_spherical_polar(x, y, z):
     """ Calculates the polar angle in spherical coordinates from Cartesian
     coordinates. The polar angle is in [0,pi].
@@ -153,8 +141,7 @@ def spherical_to_cartesian(rho, phi, theta):
     z = rho * numpy.cos(theta)
     return x, y, z
 
-
 __all__ = ['cartesian_to_spherical_rho', 'cartesian_to_spherical_azimuthal',
            'cartesian_to_spherical_polar', 'cartesian_to_spherical',
            'spherical_to_cartesian',
-           ]
+          ]