[Bug] _lfortran_caimag and _lfortran_zaimag is defined as @ccall but is not defined anywhere

[Vipul-Cariappa]

A bug arises when using the modulo operator with the interactive shell. LLVM jit cannot find _lfortran_caimag and _lfortran_zaimag functions. I used grep to find any definition of the two functions but I did not find any. I believe the functions are not required.

Example to replicate:

>>> print(2 % 3)
JIT session error: Symbols not found: [ _lfortran_zaimag, _lfortran_caimag ]
< Stack Track ... >

You will find that they are declared at

lpython/src/runtime/lpython_builtin.py

Lines 438 to 444 in 8773842

	@ccall
	def _lfortran_caimag(x: c32) -> f32:
	pass
	@ccall
	def _lfortran_zaimag(x: c64) -> f64:
	pass

.