Issue regarding target python

[chauncygu]

When I finished generated code and ran Python code with python /Users/shangding/Documents/mycode/lingua_franca/test_program/src-gen/first_reactor/first_reactor.py, It happens errors:
Traceback (most recent call last): File "/Users/shangding/Documents/mycode/lingua_franca/test_program/src-gen/first_reactor/first_reactor.py", line 7, in <module> from LinguaFrancafirst_reactor import ( SystemError: initialization of LinguaFrancafirst_reactor did not return an extension module

The source code within first_reactor.lf is as follows:

`target Python

main reactor {
reaction(startup) {=
print("Hello World.")
=}
}`

On my laptop, C can work well, but Python has the above issue.

[edwardalee]

This is the same issue as #2298. We really need to revert the change referenced there.