do not disable auto-fill when enabling LCP distortion correction

This was a workaround for an old bug (#1791 and #3765) that is no longer necessary

rtgui/lensgeom.cc

@@ -119,28 +119,3 @@ void LensGeometry::setBatchMode (bool batchMode)
     removeIfThere (this, autoCrop);
 }
 
-void LensGeometry::disableAutoFillIfActive ()
-{
-    const auto func = [](gpointer data) -> gboolean {
-        GThreadLock lock; // Is this really needed?
-
-        LensGeometry* const instance = static_cast<LensGeometry*>(data);
-
-        if (!instance->batchMode) {
-            if (instance->fill->get_active()) {
-                instance->fillConn.block(true);
-                instance->fill->set_active(false);
-
-                if (instance->listener) {
-                    instance->listener->panelChanged (EvTransAutoFill, M("GENERAL_DISABLED"));
-                }
-
-                instance->fillConn.block(false);
-            }
-        }
-
-        return FALSE;
-    };
-
-    idle_register.add(func, this);
-}

rtgui/lensgeom.h

@@ -54,7 +54,6 @@ public:
     {
         rlistener = l;
     }
-    void disableAutoFillIfActive ();
 
 private:
     IdleRegister idle_register;

rtgui/lensprofile.cc

@@ -144,10 +144,6 @@ void LensProfilePanel::write( rtengine::procparams::ProcParams* pp, ParamsEdited
 
 void LensProfilePanel::onLCPFileChanged()
 {
-
-    // Disable Auto-Fill when enabling LCP Distortion Correction, #1791
-    lensgeomLcpFill->disableAutoFillIfActive();
-
     lcpFileChanged = true;
     updateDisabled(lcpStore->isValidLCPFileName(fcbLCPFile->get_filename()));
 
@@ -170,12 +166,6 @@ void LensProfilePanel::onLCPFileReset()
 
 void LensProfilePanel::onUseDistChanged()
 {
-
-    // Disable Auto-Fill when enabling LCP Distortion Correction, #1791
-    if (ckbUseDist->get_active()) {
-        lensgeomLcpFill->disableAutoFillIfActive();
-    }
-
     useDistChanged = true;
 
     if (listener) {