libpod: journald do not lock thread

This is not needed and was added by during debugging but it turned out
to be something else. We should not lock the thread unless needed
because this just raises question why it is here otherwise.
Also the lock would not do much as we spawn a goroutine below anyway so
it runs on another thread no matter what.

From the review comment by Miloslav but it was merged before I had the
chance to fix it:
https://github.com/containers/podman/pull/24406#discussion_r1828102666

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

libpod/events/journal_linux.go

@@ -7,7 +7,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"runtime"
 	"strconv"
 	"time"
 
@@ -99,8 +98,6 @@ func (e EventJournalD) Write(ee Event) error {
 
 // Read reads events from the journal and sends qualified events to the event channel
 func (e EventJournalD) Read(ctx context.Context, options ReadOptions) (retErr error) {
-	runtime.LockOSThread()
-	defer runtime.UnlockOSThread()
 	filterMap, err := generateEventFilters(options.Filters, options.Since, options.Until)
 	if err != nil {
 		return fmt.Errorf("failed to parse event filters: %w", err)