Remove plugins.txt install

setup.py

@@ -103,40 +103,6 @@ def check_plugins(plugin_list):
     return only_pinned
 
 
-def pipinstall(package_list):
-    """Pip install PyPi packages."""
-
-    if not isinstance(package_list, list):
-        raise TypeError('Pre-install inputs must be of type list.')
-
-    for package in package_list:
-        subprocess.check_call(
-            [sys.executable, '-m', 'pip', 'install', package]
-        )
-
-
-def install_plugins():
-    """Install Plug-Ins."""
-
-    plugin_list = pysap_plugins
-    if only_plugins:
-        plugin_list = check_plugins(only_plugins)
-    elif no_plugins:
-        plugin_list = []
-
-    pipinstall(plugin_list)
-
-    print('\nPySAP plug-ins installed: {0}\n'.format(plugin_list))
-
-
-class CustomInstall(install):
-    """Custom Install Class."""
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        atexit.register(install_plugins)
-
-
 class CMakeExtension(Extension):
     """Use absolute path in setuptools extension."""
     def __init__(self, name, sourcedir=''):
@@ -254,7 +220,6 @@ def run(self):
 
 # Set default values for ext_modules and cmdclass
 ext_modules = None
-cmdclass = {'install': CustomInstall}
 
 # Add Sparse2D build commands
 if build_sparse2d: