Removing feature names from the "allowed feature" config list.

These features have all been removed from Mbed OS in the past. This
prevents their use in the future.

tools/config/__init__.py

@@ -63,12 +63,7 @@ BOOTLOADER_OVERRIDES = ROM_OVERRIDES | RAM_OVERRIDES
 
 
 ALLOWED_FEATURES = [
-    "BOOTLOADER","UVISOR", "BLE", "CLIENT", "IPV4", "LWIP", "COMMON_PAL", "STORAGE",
-    "NANOSTACK","CRYPTOCELL310",
-    # Nanostack configurations
-    "LOWPAN_BORDER_ROUTER", "LOWPAN_HOST", "LOWPAN_ROUTER", "NANOSTACK_FULL",
-    "THREAD_BORDER_ROUTER", "THREAD_END_DEVICE", "THREAD_ROUTER",
-    "ETHERNET_HOST",
+    "BOOTLOADER", "BLE", "LWIP", "STORAGE", "NANOSTACK", "CRYPTOCELL310",
 ]
 
 # Base class for all configuration exceptions
@@ -749,7 +744,7 @@ class Config(object):
         if start > rom_start + rom_size:
             raise ConfigException("Not enough memory on device to fit all "
                                   "application regions")
-    
+
     @staticmethod
     def _find_sector(address, sectors):
         target_size = -1
@@ -762,13 +757,13 @@ class Config(object):
         if (target_size < 0):
             raise ConfigException("No valid sector found")
         return target_start, target_size
-        
+
     @staticmethod
     def _align_floor(address, sectors):
         target_start, target_size = Config._find_sector(address, sectors)
         sector_num = (address - target_start) // target_size
         return target_start + (sector_num * target_size)
-    
+
     @staticmethod
     def _align_ceiling(address, sectors):
         target_start, target_size = Config._find_sector(address, sectors)