Revert "GitHub: Try to bring back LTO"

This reverts commit 30edf69.

Author: JoshuaDoes

.github/workflows/openwrt-build/configs/main

@@ -5,7 +5,7 @@ CONFIG_DEVEL=y
 #CONFIG_USE_GC_SECTIONS=y
 
 # Use the link-time optimizer for all packages
-CONFIG_USE_LTO=y
+#CONFIG_USE_LTO=y
 
 # Use ccache to improve performance of fresh rebuilds
 CONFIG_CCACHE=y