Cellular: Removed obsolete FEATURE_COMMON_PAL flag from trace

Author: Ari Parkkila

features/cellular/TESTS/socket/udp/template_mbed_app.json.txt

@@ -26,7 +26,7 @@
         "*": {
             "ppp-cell-iface.apn-lookup": false,
             "cellular.use-apn-lookup": false,
-            "target.features_add": ["LWIP", "COMMON_PAL"],
+            "target.features_add": ["LWIP"],
             "mbed-trace.enable": true,
             "lwip.ipv4-enabled": true,
             "lwip.ipv6-enabled": true,

features/cellular/framework/common/CellularLog.h

@@ -24,22 +24,11 @@
 #define FEA_TRACE_SUPPORT
 #endif
 
-#if defined(FEATURE_COMMON_PAL)
-
 #include "mbed-trace/mbed_trace.h"
 #ifndef TRACE_GROUP
 #define TRACE_GROUP  "CELL"
 #endif // TRACE_GROUP
 
-#else
-
-#define tr_debug(...) (void(0))
-#define tr_info(...)  (void(0))
-#define tr_error(...) (void(0))
-#define tr_warn(...) (void(0))
-
-#endif // FEATURE_COMMON_PAL
-
 /**
  * Set mutex wait/release functions for 'tr_' macros,
  * implementation here is modified from that found from mbed_trace.