[INFRA] LGTM recommendation: Unused local variable (#853)

* [INFRA] LGTM recommendation: Unused local variable

The value assigned to local variable 'data' is never used.

* [INFRA] LGTM recommendation: Unused import

Import of 'macros' is not used.

pdf_build_src/process_markdowns.py

@@ -16,7 +16,7 @@
 import numpy as np
 
 sys.path.append("../tools/")
-from schemacode import macros
+from schemacode import macros  # noqa   (used in "eval" call later on)
 
 
 def run_shell_cmd(command):
@@ -410,7 +410,7 @@ def edit_titlepage():
                 "\\end{titlepage}")
 
     with open('cover.tex', 'w') as file:
-        data = file.writelines(data)
+        file.writelines(data)
 
 
 def process_macros(duplicated_src_dir_path):