python: Remove SWIG

Remove SWIG-specific Python code.

Change-Id: If1d1b253d84021c9a8f9a64027ea7a94f2336dff
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2922
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>

src/python/m5/__init__.py

@@ -31,7 +31,7 @@
 # scripts while allowing new SCons code to operate properly.
 
 try:
-    # Try to import something that's generated by swig
+    # Try to import a native module
     import _m5.core
 
     # Try to grab something from it in case demandimport is being used