remove a broken 0.1.x to 0.2+ upgrade procedure

auto/install

diff --git a/auto/install b/auto/install
index f876891..94733d3 100644
--- a/auto/install
+++ b/auto/install
@@ -144,19 +144,4 @@
 	test -f $NGX_PID_PATH.oldbin
 
 	kill -QUIT \`cat $NGX_PID_PATH.oldbin\`
-
-upgrade1:
-	# upgrade 0.1.x to 0.2+
-
-	$NGX_SBIN_PATH -t
-
-	cp $NGX_PID_PATH $NGX_PID_PATH.oldbin
-
-	kill -USR2 \`cat $NGX_PID_PATH\`
-	sleep 1
-	test -f $NGX_PID_PATH.oldbin
-
-	cp $NGX_PID_PATH $NGX_PID_PATH.newbin
-
-	kill -QUIT \`cat $NGX_PID_PATH.oldbin\`
 END