sage --package create: When re-creating as a normal or wheel package,…

… remove requirements.txt

build/sage_bootstrap/creator.py

@@ -101,9 +101,19 @@ def set_python_data_and_scripts(self, pypi_package_name=None, source='normal'):
                 f.write('cd src\nsdh_pip_install .\n')
             with open(os.path.join(self.path, 'install-requires.txt'), 'w+') as f:
                 f.write('{0}\n'.format(pypi_package_name))
+            try:
+                # Remove this file, which would mark the package as a pip package.
+                os.remove(os.path.join(self.path, 'requirements.txt'))
+            except OSError:
+                pass
         elif source == 'wheel':
             with open(os.path.join(self.path, 'install-requires.txt'), 'w+') as f:
                 f.write('{0}\n'.format(pypi_package_name))
+            try:
+                # Remove this file, which would mark the package as a pip package.
+                os.remove(os.path.join(self.path, 'requirements.txt'))
+            except OSError:
+                pass
         elif source == 'pip':
             with open(os.path.join(self.path, 'requirements.txt'), 'w+') as f:
                 f.write('{0}\n'.format(pypi_package_name))