CHG: the thread comms refactoring from offical pm3 repo

chg: FPC com speed limited to 115200 when compiled with FPC
chg: USART remake (@drandreas)

client/proxmark3.h

@@ -21,14 +21,10 @@
 extern "C" {
 #endif
 
-void SendCommand(UsbCommand *c);
 const char *get_my_executable_path(void);
 const char *get_my_executable_directory(void);
 void main_loop(char *script_cmds_file, char *script_cmd, bool usb_present);
 
-bool hookUpPM3(void);
-void *uart_receiver(void *targ);
-
 #ifdef __cplusplus
 }
 #endif