Python 3: Use 'filename: learnpython*.py' (no '3')

Before renaming, Python 3 filenames were 'learnpython3*.py'.

This commit removes the '3' part from the filename.

To verify that the filenames were named consistently across
translations prior to this commit, and to change this:

```
ack -H 'filename:' python.html.markdown
find . -name "python-*.markdown" -exec ack -H 'filename:' {} \;

sed -i 's/^filename: learnpython3/filename: learnpython/' \
  python.html.markdown

find . -name "python-*.markdown" -exec \
  sed -i 's/^filename: learnpython3/filename: learnpython/' {} \;
```

1 files changed, 1 insertions, 1 deletions

diff --git a/es-es/python-es.html.markdown b/es-es/python-es.html.markdown
index aa74aaf8..7deec286 100644
--- a/es-es/python-es.html.markdown
+++ b/es-es/python-es.html.markdown
@@ -5,7 +5,7 @@ contributors:
 translators:
     - ["Camilo Garrido", "http://twitter.com/hirohope"]
 lang: es-es
-filename: learnpython3-es.py
+filename: learnpython-es.py
 ---
 
 Python fue creado por Guido Van Rossum en el principio de los 90'. Ahora es uno