Python: Remove last -p ../lib/ in options files

These were only needed for points-to.

If they only contained `--max-import-depth`, I've removed the `options`
file entirely.

Author: RasmusWL

python/ql/test/query-tests/Security/CWE-078-CommandInjection/options

@@ -1 +1 @@
-semmle-extractor-options: --lang=3 --max-import-depth=2 -p ../lib
+semmle-extractor-options: --lang=3 --max-import-depth=2

python/ql/test/query-tests/Security/CWE-079-Jinja2WithoutEscaping/options

@@ -1 +1 @@
-semmle-extractor-options: --max-import-depth=2 -p ../lib --lang=3
+semmle-extractor-options: --max-import-depth=2 --lang=3