Removes CPU, Sensors and Identify ModPC parts. (#66924)

Removes CPU, Sensors and Identify parts from modulra computers.
This is in effort to simplify how tablets and tablet apps are, while removing barriers to download specific apps. Limiting apps needed for your job, through hardware, is a terrible idea, and just limits departmental stuff to being there roundstart/latejoin, punishing people who job change through the in-game HoP system, devaluing the job as a whole.

code/modules/modular_computers/computers/machinery/modular_computer.dm

@@ -15,6 +15,8 @@
 	var/hardware_flag = 0
 	///Power usage during last tick
 	var/last_power_usage = 0
+	/// Amount of programs that can be ran at once
+	var/max_idle_programs = 4
 
 
 	///Icon state when the computer is turned off.
@@ -124,7 +126,7 @@
 
 // Modular computers can have battery in them, we handle power in previous proc, so prevent this from messing it up for us.
 /obj/machinery/modular_computer/power_change()
-	if(cpu?.use_power()) // If MC_CPU still has a power source, PC wouldn't go offline.
+	if(cpu?.use_power()) // If it still has a power source, PC wouldn't go offline.
 		set_machine_stat(machine_stat & ~NOPOWER)
 		update_appearance()
 		return