diff --git a/share/analysis-scripts/build_callgraph.py b/share/analysis-scripts/build_callgraph.py
index 0819aeaf009d2c9b3fd1285e53d40f91482c7d41..8edc32655e804bacfbb7dd8ca1ccdc1faee21bc0 100755
--- a/share/analysis-scripts/build_callgraph.py
+++ b/share/analysis-scripts/build_callgraph.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 ##########################################################################
 #                                                                        #
@@ -33,14 +32,6 @@ import source_filter
 
 under_test = os.getenv("PTESTS_TESTING")
 
-arg = ""
-if len(sys.argv) < 2:
-    print(f"usage: {sys.argv[0]} file...")
-    print("        builds a heuristic callgraph for the specified files.")
-    sys.exit(1)
-else:
-    files = sys.argv[1:]
-
 debug = os.getenv("DEBUG")