lint: simplify code (gosimple)

Replaces infinite for loops containing a select on a channel with a
single case with a range over the channel.

Removes redundant assignments to blank identifiers.

Remove unnecessary guard clause around delete().

Remove `if condition { return true } return false` with return condition

Signed-off-by: Moritz Poldrack <moritz@poldrack.dev>
Acked-by: Robin Jarry <robin@jarry.cc>

widgets/account-wizard.go

@@ -194,7 +194,7 @@ func NewAccountWizard(conf *config.AercConfig, aerc *Aerc) *AccountWizard {
 					}
 					wizard.imapUri()
 				}
-				hostport, srv = getSRV(server, []string{"submission"})
+				hostport, _ = getSRV(server, []string{"submission"})
 				if hostport != "" {
 					wizard.smtpServer.Set(hostport)
 					wizard.smtpMode = SMTP_STARTTLS

widgets/dirtree.go

@@ -385,7 +385,7 @@ func buildTree(node *types.Thread, stree [][]string, defaultUid uint32) {
 	}
 	sort.Strings(keys)
 	for _, key := range keys {
-		next, _ := m[key]
+		next := m[key]
 		var uid uint32 = defaultUid
 		for _, testStr := range next {
 			if len(testStr) == 1 {