ath11k: pci: remove experimental warning

I have received feedback that QCA6390 PCI support is working for many, and I'm
also using QCA6390 on my daily driver^Hlaptop. While there are issues still
to be resolved it's not really experimental anymore, so remove the experimental
warning from driver initialisation.

Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1613040697-20289-1-git-send-email-kvalo@codeaurora.org

drivers/net/wireless/ath/ath11k/pci.c

@@ -1086,8 +1086,6 @@ static int ath11k_pci_probe(struct pci_dev *pdev,
 	u32 soc_hw_version, soc_hw_version_major, soc_hw_version_minor;
 	int ret;
 
-	dev_warn(&pdev->dev, "WARNING: ath11k PCI support is experimental!\n");
-
 	ab = ath11k_core_alloc(&pdev->dev, sizeof(*ab_pci), ATH11K_BUS_PCI,
 			       &ath11k_pci_bus_params);
 	if (!ab) {