remove kernel override ability

This was landed to try to address an issue with netns vs nbd during
icehouse development. It never really got us anywhere, and is now
just cruft.

Change-Id: Ie498fae8d1f796c1fc83459c65d0de948d1d50ce
diff --git a/tools/fixup_stuff.sh b/tools/fixup_stuff.sh
index 8b1e4df..50fb31c 100755
--- a/tools/fixup_stuff.sh
+++ b/tools/fixup_stuff.sh
@@ -93,24 +93,6 @@
     sudo chmod +r $dir/*
 fi
 
-# Ubuntu 12.04
-# ------------
-
-# We can regularly get kernel crashes on the 12.04 default kernel, so attempt
-# to install a new kernel
-if [[ ${DISTRO} =~ (precise) ]]; then
-    # Finally, because we suspect the Precise kernel is problematic, install a new kernel
-    UPGRADE_KERNEL=$(trueorfalse False $UPGRADE_KERNEL)
-    if [[ $UPGRADE_KERNEL == "True" ]]; then
-        if [[ ! `uname -r` =~ (^3\.11) ]]; then
-            apt_get install linux-generic-lts-saucy
-            echo "Installing Saucy LTS kernel, please reboot before proceeding"
-            exit 1
-        fi
-    fi
-fi
-
-
 if is_fedora; then
     # Disable selinux to avoid configuring to allow Apache access
     # to Horizon files (LP#1175444)