Remove preview command from main execution flow

Author: smartlizardpy

ssg.py

@@ -112,7 +112,3 @@ def getblogposts():
                         shutil.rmtree(dst_static)
                     shutil.copytree(src_static, dst_static)
 
-if sys.argv[1] == "--preview":
-    os.system('cd output && python3 -m http.server')
-else:
-    pass