Remove the obsolete profiling.md document

A long time ago the profiling.md document has been created and during
the last 9 years, it became obsolete - despite the fact it was being
updated, the updates were about formatting, typos, references, etc.
It's not possible to get the required requirements. I've been asking
around and apparently some components have been lost to time. Therefore
the file may be removed to not cause unnecessary noise.

developer/debugging/profiling.md

@@ -1,98 +0,0 @@
----
-lang: en
-layout: doc
-permalink: /doc/profiling/
-redirect_from:
-- /en/doc/profiling/
-- /doc/Profiling/
-- /wiki/Profiling/
-ref: 48
-title: Python profiling
----
-
-This is a python profiling primer.
-
-For the purpose of this document, `qubes-dev` is name of the domain used for postprocessing profiling stats.
-
-## Requirements
-
-~~~
-yum install gprof2dot graphviz
-git clone http://git.woju.eu/qubes/profiling.git
-~~~
-
-If you profile something in dom0, move `Upload.sh` from the repository to dom0:
-
-~~~
-mkdir -p ~/profiling
-qvm-run -p qubes-dev 'cat ~/profiling/Upload.sh' > ~/profiling/Upload.sh
-~~~
-
-- WARNING: this will obviously be running third-party code which is not signed by ITL nor Fedora. You have been warned.
-
-## Workflow
-
-### Identify function responsible for some slow action
-
-You have to select the area in which you suspect less than optimal performance. If you do not narrow the area, graphs may be unreadable.
-
-### Replace suspect function with probe
-
-Replace
-
-```python
-def foo(self, bar):
-    # function content
-```
-
-with
-
-```python
-def foo(self, *args, **kwargs):
-    profile.runctx('self.real_foo(*args, **kwargs)', globals(), locals(),
-        time.strftime('/home/user/profiling/foo-%Y%m%d-%H%M%S.pstats'))
-
-def real_foo(self, bar):
-    # function content
-```
-
-### Run application
-
-Beware that some functions may be called often. For example `qubesmanager/main.py:update_table` gets run once per second. This will produce one pstat file per second.
-
-Remember to revert your changes to the application afterwards.
-
-### Upload statistics
-
-If you are in dom0:
-
-~~~
-cd ~/profiling
-./Upload.sh
-~~~
-
-### Analyse
-
-~~~
-make
-~~~
-
-For every `${basename}.pstats` this will produce `${basename}.txt` and `${basename}.svg`. SVG files contain call graphs. Text files contain lists of all functions, sorted by cumulative execution time. You may also try `make all-png`.
-
-~~~
-make index.html
-~~~
-
-This creates `index.html` with all SVG graphics linked to TXT files, ready for upload.
-
-~~~
-make REMOTE=example.com:public_html/qubes/profiling/ upload
-~~~
-
-## Example
-
-This example is from `qubes-manager` (`qubesmanager/main.py`).
-
-!["update\_table-20140424-170010.svg"](//attachment/doc/update_table-20140424-170010.svg)
-
-It is apparent that the problem is around `get_disk_usage`, which calls something via `subprocess.call`. It does this 15 times, probably once per VM.