tests: build_all: modem: remove gsm_ppp from test suite

The deprecated gsm_ppp modem driver will be removed. Remove
gsm_ppp modem driver from build_all test suite.

Signed-off-by: Bjarki Arge Andreasen <bjarki@arge-andreasen.me>

tests/drivers/build_all/modem/modem_gsm.conf

@@ -1,9 +0,0 @@
-CONFIG_GPIO=y
-CONFIG_SERIAL=y
-CONFIG_MODEM=y
-CONFIG_NETWORKING=y
-CONFIG_NET_IPV4=y
-CONFIG_NET_DRIVERS=y
-CONFIG_NET_PPP=y
-CONFIG_NET_L2_PPP=y
-CONFIG_MODEM_GSM_PPP=y

tests/drivers/build_all/modem/modem_gsm_mux.conf

@@ -1,11 +0,0 @@
-CONFIG_GPIO=y
-CONFIG_SERIAL=y
-CONFIG_MODEM=y
-CONFIG_NETWORKING=y
-CONFIG_NET_IPV4=y
-CONFIG_NET_DRIVERS=y
-CONFIG_NET_PPP=y
-CONFIG_NET_L2_PPP=y
-CONFIG_MODEM_GSM_PPP=y
-CONFIG_GSM_MUX=y
-CONFIG_UART_MUX=y

tests/drivers/build_all/modem/testcase.yaml

@@ -31,22 +31,6 @@ tests:
     extra_args: CONF_FILE=modem_quectel_bg9x.conf
     extra_configs:
       - CONFIG_UART_ASYNC_API=y
-  drivers.modem.modem_gsm.interrupt_driven.build:
-    extra_args: CONF_FILE=modem_gsm.conf
-    extra_configs:
-      - CONFIG_UART_INTERRUPT_DRIVEN=y
-  drivers.modem.modem_gsm.async.build:
-    extra_args: CONF_FILE=modem_gsm.conf
-    extra_configs:
-      - CONFIG_UART_ASYNC_API=y
-  drivers.modem.modem_gsm_mux.interrupt_driven.build:
-    extra_args: CONF_FILE=modem_gsm_mux.conf
-    extra_configs:
-      - CONFIG_UART_INTERRUPT_DRIVEN=y
-  drivers.modem.modem_gsm_mux.async.build:
-    extra_args: CONF_FILE=modem_gsm_mux.conf
-    extra_configs:
-      - CONFIG_UART_ASYNC_API=y
   drivers.modem.modem_esp_at.interrupt_driven.build:
     extra_args: CONF_FILE=modem_esp_at.conf
     extra_configs:

tests/drivers/build_all/modem/uart.dtsi

@@ -53,10 +53,6 @@ test_quectel_eg25_g: quectel_eg25_g {
 	mdm-reset-gpios = <&test_gpio 0 0>;
 };
 
-test_gsm_ppp: gsm_ppp {
-	compatible = "zephyr,gsm-ppp";
-};
-
 test_telit_me910g1: telit_me910g1 {
 	compatible = "telit,me910g1";