Remove OS thread locking for Go-Python calls

This appears to be no longer necessary, as Python handlers themselves
run in a separate thread pool.

slidge_whatsapp/gateway.go

@@ -3,9 +3,7 @@ package whatsapp
 import (
 	// Standard library.
 	"fmt"
-	"net/http"
 	"os"
-	"runtime"
 
 	// Third-party libraries.
 	_ "github.com/mattn/go-sqlite3"
@@ -78,9 +76,8 @@ type Gateway struct {
 	TempDir string // The directory to create temporary files under.
 
 	// Internal variables.
-	container  *sqlstore.Container
-	httpClient *http.Client
-	logger     walog.Logger
+	container *sqlstore.Container
+	logger    walog.Logger
 }
 
 // NewGateway returns a new, un-initialized Gateway. This function should always be followed by calls
@@ -92,11 +89,6 @@ func NewGateway() *Gateway {
 // SetLogHandler specifies the log handling function to use for all [Gateway] and [Session] operations.
 func (w *Gateway) SetLogHandler(h HandleLogFunc) {
 	w.logger = HandleLogFunc(func(level ErrorLevel, message string) {
-		// Don't allow other Goroutines from using this thread, as this might lead to concurrent
-		// use of the GIL, which can lead to crashes.
-		runtime.LockOSThread()
-		defer runtime.UnlockOSThread()
-
 		h(level, message)
 	})
 }

slidge_whatsapp/session.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"math/rand"
 	"os"
-	"runtime"
 	"time"
 
 	// Third-party libraries.
@@ -663,11 +662,6 @@ func (s *Session) propagateEvent(kind EventKind, payload *EventPayload) {
 		payload = &EventPayload{}
 	}
 
-	// Don't allow other Goroutines from using this thread, as this might lead to concurrent use of
-	// the GIL, which can lead to crashes.
-	runtime.LockOSThread()
-	defer runtime.UnlockOSThread()
-
 	s.eventHandler(kind, payload)
 }