Get rid of FEATURE_COMMON_PAL

Nanostack related files moved under 'feature/nanostack'
Common libraries moved to 'features/frameworks'

Allow FEATURE_COMMON_PAL still to be defined in the build so
that we don't break any builds.

features/FEATURE_LWIP/lwip-interface/lwip-sys/lwip_random.c

@@ -18,9 +18,6 @@
 #include "lwip/debug.h"
 #include "lwip/def.h"
 #include "lwip_random.h"
-
-#if FEATURE_COMMON_PAL
-
 #include "randLIB.h"
 
 void lwip_seed_random(void)
@@ -37,20 +34,3 @@ inline uint32_t lwip_get_random(void)
 {
     return randLIB_get_32bit();
 }
-
-#else
-
-void lwip_seed_random(void)
-{
-}
-
-void lwip_add_random_seed(uint64_t seed)
-{
-}
-
-uint32_t lwip_get_random(void)
-{
-    return rand();
-}
-
-#endif

features/FEATURE_LWIP/lwip-interface/ppp_lwip.cpp

@@ -18,14 +18,8 @@
 #include "platform/FileHandle.h"
 #include "platform/mbed_poll.h"
 #include "events/EventQueue.h"
-#if defined(FEATURE_COMMON_PAL)
 #include "mbed_trace.h"
 #define TRACE_GROUP "LPPP"
-#else
-#define tr_debug(...) (void(0)) //dummies if feature common pal is not added
-#define tr_info(...)  (void(0)) //dummies if feature common pal is not added
-#define tr_error(...) (void(0)) //dummies if feature common pal is not added
-#endif //defined(FEATURE_COMMON_PAL)
 #include "rtos/Thread.h"
 #include "lwip/tcpip.h"
 #include "lwip/tcp.h"

features/frameworks/mbed-trace/README.md

@@ -58,7 +58,6 @@ The purpose of the library is to provide a light, simple and general tracing sol
 
 ### Enabling the tracing API in mbed OS 5
 
-* Add the feature COMMON_PAL into the build
 * Set `MBED_CONF_MBED_TRACE_ENABLE` to 1 or true
 
 To do so, add the following to your mbed_app.json:
@@ -67,7 +66,6 @@ To do so, add the following to your mbed_app.json:
 {
     "target_overrides": {
         "*": {
-            "target.features_add": ["COMMON_PAL"],
             "mbed-trace.enable": 1
         }
     }