Fix problems reported by staticcheck

`staticcheck` is a golang code analysis tool. https://staticcheck.io/

This commit fixes a lot of problems found in our code. Common problems are:
- unnecessary use of fmt.Sprintf
- duplicated imports with different names
- unnecessary check that a key exists before a delete call

There are still a lot of reported problems in the test files but I have
not looked at those.

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/libpod/network/netconflist.go b/libpod/network/netconflist.go
index bf7d03501..165a9067b 100644
--- a/libpod/network/netconflist.go
+++ b/libpod/network/netconflist.go
@@ -216,7 +216,7 @@ func IfPassesFilter(netconf *libcni.NetworkConfigList, filters map[string][]stri
 					filterValue = ""
 				}
 				for labelKey, labelValue := range labels {
-					if labelKey == filterKey && ("" == filterValue || labelValue == filterValue) {
+					if labelKey == filterKey && (filterValue == "" || labelValue == filterValue) {
 						result = true
 						continue outer
 					}