Don't test if symlink exists before 'rm -f'

When the symlink's target doesn't exist, '[ -f' is false, so the symlink doesn't get removed.
Since we do always want it to be removed, just call 'rm -f' anyway, which won't complain
if the file doesn't exist.

weaver/weave

@@ -114,7 +114,7 @@ configure_container_networking() {
     NSPID=$DOCKERPID
 
     [ ! -d /var/run/netns ] && mkdir -p /var/run/netns
-    [ -f /var/run/netns/$NSPID ] && rm -f /var/run/netns/$NSPID
+    rm -f /var/run/netns/$NSPID
     ln -s /proc/$NSPID/ns/net /var/run/netns/$NSPID
 
     EXITCODE=1
@@ -136,7 +136,7 @@ configure_container_networking() {
         fi
     fi
 
-    [ -f /var/run/netns/$NSPID ] && rm -f /var/run/netns/$NSPID
+    rm -f /var/run/netns/$NSPID
 
     return $EXITCODE
 }