dt-bindings: pinctrl: imxrt1020: remove useless comment

A comment note has been left after completing pinctrl listing, so let's
remove it since it's useless.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
diff --git a/include/dt-bindings/pinctrl/pins-imxrt1020.h b/include/dt-bindings/pinctrl/pins-imxrt1020.h
index c6bacb7..b3a833b 100644
--- a/include/dt-bindings/pinctrl/pins-imxrt1020.h
+++ b/include/dt-bindings/pinctrl/pins-imxrt1020.h
@@ -7,8 +7,6 @@
 #ifndef _DT_BINDINGS_PINCTRL_IMXRT1020_PINFUNC_H
 #define _DT_BINDINGS_PINCTRL_IMXRT1020_PINFUNC_H
 
-/* TODO: continue from LPI2C4_SDA_SELECT_INPUT */
-
 #define IMX_PAD_SION	0x40000000
 
 /*