AP_Scripting: remove old setjmp workarounds

No longer necessary; verified with a debugger. These were also never
applied to Cortex-M4.

libraries/AP_Scripting/AP_Scripting.cpp

@@ -294,15 +294,6 @@ MAV_RESULT AP_Scripting::handle_command_int_packet(const mavlink_command_int_t &
 }
 #endif
 
-/*
-  avoid optimisation of the thread function. This avoids nasty traps
-  where setjmp/longjmp does not properly handle save/restore of
-  floating point registers on exceptions. This is an extra protection
-  over the top of the fix in luaD_rawrunprotected() for the same issue
- */
-#pragma GCC push_options
-#pragma GCC optimize ("O0")
-
 void AP_Scripting::thread(void) {
     while (true) {
         // reset flags
@@ -398,7 +389,6 @@ void AP_Scripting::thread(void) {
         }
     }
 }
-#pragma GCC pop_options
 
 void AP_Scripting::handle_mission_command(const AP_Mission::Mission_Command& cmd_in)
 {