staging: rtl8188eu: remove _CHIP_TYPE enum

This enum is not used and can be removed.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210718173610.894-4-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/hal_intf.h

@@ -11,16 +11,6 @@
 #include <drv_types.h>
 #include <hal8188e_phy_cfg.h>
 
-enum _CHIP_TYPE {
-	NULL_CHIP_TYPE,
-	RTL8712_8188S_8191S_8192S,
-	RTL8188C_8192C,
-	RTL8192D,
-	RTL8723A,
-	RTL8188E,
-	MAX_CHIP_TYPE
-};
-
 enum hw_variables {
 	HW_VAR_MEDIA_STATUS,
 	HW_VAR_MEDIA_STATUS1,