ARM: dts: aspeed: Rainier 4U: Remove fan updates

The 4U fans do not need a different "tach-pulses" property than the 2U
machine. In addition, the "maxim,fan-dual-tach" property does not exist
upstream yet, so it should also be removed.

Signed-off-by: Eddie James <[e-mail]>
Signed-off-by: Joel Stanley <[e-mail]>

arch/arm/boot/dts/aspeed-bmc-ibm-rainier-4u.dts

···
 		reg = <0x6b>;
 	};
 };
-
-&fan0 {
-	tach-pulses = <4>;
-	/delete-property/ maxim,fan-dual-tach;
-};
-
-&fan1 {
-	tach-pulses = <4>;
-	/delete-property/ maxim,fan-dual-tach;
-};
-
-&fan2 {
-	tach-pulses = <4>;
-	/delete-property/ maxim,fan-dual-tach;
-};
-
-&fan3 {
-	tach-pulses = <4>;
-	/delete-property/ maxim,fan-dual-tach;
-};
-
-&fan4 {
-	tach-pulses = <4>;
-	/delete-property/ maxim,fan-dual-tach;
-};
-
-&fan5 {
-	tach-pulses = <4>;
-	/delete-property/ maxim,fan-dual-tach;
-};