remove ${misc:Depends}, it's unnecessary

- this only got added because of a lintian error/warning which isn't thrown
  anymore (4584ba61d9)

debian/control

@@ -7,7 +7,7 @@ Build-Depends: debhelper (>= 8.0.0)
 
 Package: statsd
 Architecture: all
-Depends: ${misc:Depends}, nodejs (>= 0.6), adduser
+Depends: nodejs (>= 0.6), adduser
 Description: Stats aggregation daemon
   A network daemon for aggregating statistics (counters and timers),
   rolling them up, then sending them to graphite.