arm64: dts: qcom: sc7180: kill IPA modem-remoteproc property

The "modem-remoteproc" property is no longer required for the IPA
driver, so get rid of it.
Signed-off-by: NAlex Elder <elder@linaro.org>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

arch/arm64/boot/dts/qcom/sc7180.dtsi

@@ -1434,8 +1434,6 @@
 			qcom,smem-state-names = "ipa-clock-enabled-valid",
 						"ipa-clock-enabled";
 
-			modem-remoteproc = <&remoteproc_mpss>;
-
 			status = "disabled";
 		};