Remove Pip from default includes

This commit disables pip installation from windows builds.  pip can be
installed at any time by running `python -mensurepip` this will install
pip and setuptools wheels that are packaged with the core.

The decision to remove pip from the core was due to our additive model
of packages - a pip or setuptools built in the build process is unable
to entirely replace the original modules.

Author: icanhasmath

PC/layout/support/options.py

@@ -40,7 +40,6 @@ def public(f):
         "help": "APPX package",
         "options": [
             "stable",
-            "pip",
             "distutils",
             "tcltk",
             "idle",
@@ -56,7 +55,6 @@ def public(f):
         "options": [
             "dev",
             "tools",
-            "pip",
             "stable",
             "distutils",
             "venv",
@@ -67,7 +65,6 @@ def public(f):
         "help": "development kit package",
         "options": [
             "stable",
-            "pip",
             "distutils",
             "tcltk",
             "idle",