Remove a few redundant language.h includes
Also remove language.h include from cmdqueue.h to prevent including language.h unnecessarily
Fix missing message.h includes in a few files
Main changes:
* setAllTargetHotends() is removed
* setTargetHotendSafe() is removed
* Extruder parameter on setTargetHotend() is dropped
Change in memory:
Flash: -192 bytes
SRAM: 0 bytes