[SCons] Remove non-functional python_array_home option

This option has been broken since before Cantera 2.3.0, so must have
been unused.

SConstruct

@@ -346,11 +346,6 @@ config_options = [
            PYTHON_CMD is not set, then the configuration process will use the
            same Python interpreter being used by SCons.""",
         sys.executable),
-    PathVariable(
-        'python_array_home',
-        """If NumPy was installed using the '--home' option, set this to the home
-           directory for NumPy for Python 2.""",
-        '', PathVariable.PathAccept),
     PathVariable(
         'python_prefix',
         """Use this option if you want to install the Cantera Python 2 package to
@@ -375,11 +370,6 @@ config_options = [
            'python2'; if this executable cannot be found, this
            value must be specified to build the Python 2 module.""",
         'python2', PathVariable.PathAccept),
-    PathVariable(
-        'python2_array_home',
-        """If NumPy was installed using the '--home' option, set this to the home
-           directory for NumPy for Python 2.""",
-        '', PathVariable.PathAccept),
     PathVariable(
         'python2_prefix',
         """Use this option if you want to install the Cantera Python 2 package to
@@ -404,11 +394,6 @@ config_options = [
            'python3'; if this executable cannot be found, this
            value must be specified to build the Python 3 module.""",
         'python3', PathVariable.PathAccept),
-    PathVariable(
-        'python3_array_home',
-        """If NumPy was installed using the '--home' option, set this to the home
-           directory for NumPy for Python 3.""",
-        '', PathVariable.PathAccept),
     PathVariable(
         'python3_prefix',
         """Use this option if you want to install the Cantera Python 3 package to
@@ -1221,7 +1206,7 @@ if env['python_package'] in ('full', 'minimal', 'default'):
                       "ignored.".format(v=major, option=env[py_pkg]))
         else:  # pythonX_package is 'default'
             # This dictionary has the default values for the Python related variables
-            default_py_vars = {'python{}_array_home': '', 'python{}_cmd': 'python{}'.format(major),
+            default_py_vars = {'python{}_cmd': 'python{}'.format(major),
                        'python{}_prefix': '$prefix'}
 
             env[py_pkg] = env['python_package']
@@ -1238,7 +1223,6 @@ if env['python_package'] in ('full', 'minimal', 'default'):
 # Make sure everything gets converted to properly versioned variables by deleting
 # these so they don't get used accidentally
 del env['python_package']
-del env['python_array_home']
 del env['python_cmd']
 del env['python_prefix']
 
@@ -1330,9 +1314,6 @@ def configure_full_python(py_ver):
             print(err)
     """)
 
-    if env['python{}_array_home'.format(py_ver)]:
-        script = "sys.path.append({})\n".format(env['python{}_array_home'.format(py_ver)]) + script
-
     try:
         info = getCommandOutput(env['python{}_cmd'.format(py_ver)], '-c', script).splitlines()
     except OSError as err:

platform/posix/SConscript

@@ -31,7 +31,6 @@ if localenv['layout'] != 'debian' and env['OS'] != 'Windows':
         else:
             env['python_module_loc_sc'] = env['python{}_module_loc'.format(major)]
         env['python_cmd'] = env['python{}_cmd'.format(major)]
-        env['python_array_home'] = env['python{}_array_home'.format(major)]
 
     for script in ['setup_cantera', 'setup_cantera.csh']:
         target = env.SubstFile(script, script + '.in')

platform/posix/setup_cantera.csh.in

@@ -35,7 +35,3 @@ if ("@python_module_loc_sc@" != "") then
         setenv PYTHONPATH @python_module_loc_sc@:$PYTHONPATH
     endif
 endif
-
-if ("@python_array_home@" != "") then
-    setenv PYTHONPATH @python_array_home@:$PYTHONPATH
-endif

platform/posix/setup_cantera.in

@@ -41,8 +41,4 @@ if [ "@python_module_loc_sc@" != "" ]; then
     fi
 fi
 
-if [ "@python_array_home@" != "" ]; then
-    PYTHONPATH=@python_array_home@:$PYTHONPATH
-fi
-
 export PYTHONPATH