Remove use of obsolete --ignore-conflicts-at-my-risk option

--HG--
branch : setuptools
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/trunk/setuptools%4043296

setuptools/command/install.py

@@ -85,8 +85,7 @@ class install(_install):
         from setuptools.command.easy_install import easy_install
 
         cmd = easy_install(
-            self.distribution, args="x", ignore_conflicts_at_my_risk=1,
-            root=self.root, record=self.record,
+            self.distribution, args="x", root=self.root, record=self.record,
         )
         cmd.ensure_finalized()  # finalize before bdist_egg munges install cmd
 
@@ -119,5 +118,6 @@ class install(_install):
 
 
 
+